CN1717611A - Optical signal amplifying three-terminal device and its use - Google Patents

Optical signal amplifying three-terminal device and its use Download PDF

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CN1717611A
CN1717611A CN 03825695 CN03825695A CN1717611A CN 1717611 A CN1717611 A CN 1717611A CN 03825695 CN03825695 CN 03825695 CN 03825695 A CN03825695 A CN 03825695A CN 1717611 A CN1717611 A CN 1717611A
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light
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CN100368868C (en
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前田佳伸
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Japan Science and Technology Agency
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Abstract

When in an optical signal amplifying triode 10, light of a second wavelength lambda 2, selected from among light from a first optical amplifier 26, into which a first input light L1 of a first wavelength lambda 1 and a second input light L2 of second wavelength lambda 2 have been input, and a third input light (control light) L3 of a third wavelength lambda 3 are input into a second optical amplifier 34, an output light L4 of the third wavelength lambda 3, selected from among the light output from the second optical amplifier 34, is light that is modulated in response to the intensity variation of one or both of the first input light L1 of the first wavelength lambda 1 and the third input light L3 of the third wavelength lambda 3 and is an amplified signal, with which the signal gain with respect to the third input light (control light) L3 of the third wavelength lambda 3 is of a magnitude of 2 or more. An optical signal amplifying triode 10, which can directly perform an optical signal amplification process using control input light, can thus be provided.

Description

Light signal amplifies 3 arrangements of terminals and application thereof
Technical field
The present invention relates to (a) light signal and amplify 3 arrangements of terminals: amplification, control or switch light signal, especially, be suitable for carrying out the optical signal amplifying bigger device of the optoelectronic device of optical communication that high-level information handles, light image processing, optical computer, photometry amount, optic integrated circuit etc.; (b) light signal transfer approach and optical signal repeater device: be used for the light signal propagated by the predetermined transmission path of optical fiber etc., the transmission path of other that the destination information in being included in this light signal is indicated transmits; And (c) light signal memory storage: can and take out at any time the light signal storage of propagating by the predetermined transmission path of optical fiber etc.
Background technology
That adopts broadband and optical fiber communication that can high-speed transfer is known as extensively carrying out of broadband new business that moving picture communication or image distribute, expects.But, be equivalent to transistorized function (signal amplification) element of three terminals in the electronics for example, promptly directly control light signal and light function element that signal is amplified also is unrealized with other light signals.
For this reason, specially, the light signal of high-speed transfer earlier being transformed to electric signal for the time being, carrying out information processing at electronic circuit, the signal after the processing is transformed to light signal once more and transmits, is actual conditions.Thereby because can not directly control light signal with light signal, so the high speed of signal Processing has had the limit.Can directly carry out under the situation of signal Processing light signal, being called can parallel processing, and the expectation processing time can shorten more.
To this, the device of record in document 1 or the document 2, the device of switch light has only utilized the door switch unit by the wavelength conversion of the Mach-Zender type interference of light etc., and these devices have not that the heatproof degree changes, vibration, set drawbacks such as strictness.Technology before these, as the transistor in the electronic circuit, to formation have can obtain adopting control light input light is carried out the output light that signal amplifies function, light signal amplifies 3 arrangements of terminal this point does not have what enlightenment.
Secondly, in the field that can carry out the optical communication that broadband, high speed and high capacity signal transmit, the communication of this light signal that waits in expectation, transmit, be distributed under the situation of not losing its broadband, high speed and jumbo character and carry out.In nearer future, construct the optical-fiber network based on wavelength-division multiplex (WDM) of anticipation, the wavelength-division-multiplexed optical signal of the different multiple laser of the wavelength that is transmitted from side's light transmission path, light transmission path to every kind of wavelength expection transmits, and the transmission of this light signal (relaying of light signal) technology is important.Be used for a series of light signals of being propagated by the predetermined transmission path (for example wavelength bus) of optical fiber etc. (for example grouping (packet) signal), this light signal that the transmission path of other that the image scale note in being attached to these a series of light signals or the destination information of this sample of label are indicated transmits transmits, in optical-fiber network for example or carry out between optical-fiber network in the Route Selection of Route Selection, can not diminish high capacity and optical signal transmission feature at a high speed, be in optical signal repeater (transmission) device at router, also require to transmit processing at a high speed, reliability height and miniaturization etc.
Corresponding therewith, for example put down in writing the motion of optical channel cross connection device in the document 3.According to this motion, channel-splitting filter is set: the wavelength group bus that is divided into N the wavelength bus of wavelength multiplexing (wavelenth multiplex) transmission link, by every G root; With the Route Selection handling part: each wavelength group of being cut apart by this channel-splitting filter is carried out Route Selection handles; Constitute by each wavelength group like this and carry out the structure that Route Selection is handled.The Route Selection handling part of this optical channel cross connection device is by wavelength shifter: each wavelength group is carried out wavelength conversion; And optical matrix switch: by controller control, distribute by it and carry out light behind the wavelength conversion; Constitute like this.And, this optical matrix switch, make the catoptron switch of the machine work that disposes at the place, point of crossing of rectangular light path, select a job by controller, this wavelength group of reflecting among a plurality of wavelength groups, by this catoptron switch is exported to the transmission path of expection, and such structure constitutes (paragraph 0042, Figure 10 (1)); Perhaps, the photoswitch and the netted wiring of a job selected in configuration by controller, make among a plurality of wavelength groups, utilize this photoswitch and this wavelength group of passing through transmission path output in netted wiring, such structure constitutes (paragraph 0043, Figure 10 (2)).
But, optical channel cross connection device before above-mentioned, because by the catoptron switch controlled by controller work or carry out Route Selection by photoswitch and handle, in controller, indicated the Route Selection place (destination) of electronic processing output, according to command signal, catoptron switch or photoswitch are done blocked operation.Therefore, part converting optical signals is that electric signal, extraction are contained in destination information in the electric signal, the transmission coherent signal as comprising in label in the bag or the mark, transmit light signal because must make catoptron switch or photoswitch carry out electricity operation control, so response speed can not be fully high with it.In addition, for the suitable wavelength ground conversion wavelength that transmits the transmission path (wavelength bus) of destination, outside above-mentioned Route Selection handling part, also wavelength conversion portion need be set, because this wavelength conversion portion sets up at the Route Selection handling part, therefore cause the maximization of device, and especially under the catoptron switch situation that adopts machine work, can not obtain reliability sometimes.
Also have, can the broadband, the optical communication field of high speed and high capacity transmission signals, the identification of the light signal that waits in expectation (for example information block signal etc. light data), multiplexing with separate, switch, Route Selection (transmit, distribute) do not carry out with not losing its broadband, high speed and jumbo character.In the field of this light, for example optical signal processing system all who with the optical router system is the processing light signal of representative, the light signal memory storage of light signal is taken out in the timing that requirement can temporarily store and expect.This is because must have storer the same with signal Processing in electronic applications, in the light signal field, optical memory, the light signal memory storage that is called as light buffer also be must be obligato.
Corresponding therewith, for example put down in writing the motion of light storage device in the patent documentation 1.According to this motion, constitute in order to provide multiple time delay, to prepare the optical guided wave unit 105～108 that a lot of is made of respectively the different length light buffer, by make it by these optical guided wave unit 105～108 some, according to time delay in the some travel-times in corresponding these optical guided wave unit 105～108, the structure that can store light signal.
But, light storage device before above-mentioned, only according to corresponding to allowing time delay in the some travel-times in the optical guided wave unit 105～108 of lightray propagation, be predetermined the storage time of this light signal, because can not take out light signal with arbitrary timing, the signal Processing inefficiency is just inevitable so the degree of freedom of the processing of light signal is restricted.
[document 1] K.E.Stubkjaer, " Semiconductor optical amplifier-basedall-optical gates for high-speed optical processing; " IEEE J.QuamtunElectron., vol.6, no.6, PP.1428-1435, Nov./Dec.2000[document 2] T.Durhuus, C.Joergensen, B.Mikkelsen, R.J.S.Pedersen, andA.E.Stubkjaer, " All optical wavelength conversion by SOAs inaMach-Zender configuration; " IEEE photon.Technol, Lett., vol.6, pp.53-55, Jan.1994
[document 3] spy opens the 2002-262319 communique
[document 4] spy opens flat 8-204718 communique
Summary of the invention
Based on above-mentioned background, the 1st purpose of the present invention is: provide the light signal that can adopt control light directly to carry out the processing and amplifying of light signal to amplify 3 arrangements of terminals.Also have, the 2nd purpose is: provide can the high speed processing light signal Route Selection or the light signal transfer approach and the optical signal repeater device of equipment miniaturization.Also have, the 3rd purpose is: the light signal memory storage that can store and take out at any time light signal is provided.
The inventor carries out all results of research repeatedly based on above-mentioned background, has found: at the optical semiconductor amplifier element or add in the light amplification element of fiber amplifier etc. of rare earth element predetermined wavelength lambda 1Input light around the natural radiation light of wavelength, respond this input light intensity and change and Strength Changes, it changes for change in signal strength of importing light and is opposite Strength Changes; And, if other the wavelength X of promptly importing in the wavelength coverage around this natural radiation light in the light wavelength scope 2Laser be overlapping into and be mapped in the above-mentioned input light, the signal (amplitude) that above-mentioned natural radiation light then occurs continues to keep variation, and the phenomenon that integral intensity sharply increases is that the induced with laser light signal strengthens effect (Laser-induced signal enhancement effect).In addition, the inventor has also held with this phenomenon as from wavelength X 1To wavelength X 2Wavelength conversion function, conceived light 3 arrangements of terminals (All-Optical TriodeBased on Tandem Wavelength Converter) that connect the cascade Wavelength conversion element of these wavelength conversions based on 2 sections, invented light signal and amplified 3 arrangements of terminals.This 1st invention just is being based on above so practical intelligence and is making.
In addition, the inventor finds: the light amplification element that above-mentioned light signal amplifies 3 arrangements of terminals not only has from wavelength X 1To wavelength X 2Wavelength conversion function, also being conceived to it is the function element with this wavelength conversion function and switching function, by be overlapped in destination information amplitude modulation in the light signal, this function element is applicable to that just in time the routing arrangement as wavelength multiplex signals is a conveyer.This 2nd invention and the 3rd invention just are being based on above so knowledge and are making.
In addition, the inventor finds: make the light signal with above-mentioned phenomenon amplify the light amplification element of 3 arrangements of terminals, continued from wavelength X 1Toward wavelength X 2The wavelength conversion effect, the channel-splitting filter combination that distributes with corresponding input wavelength and to different output transmission path, by making light signal in round-robin ring-type transmission path, the light signal of being stored by circulation can take out at any time.The 4th invention just is being based on above so knowledge and is making.
The 1st invention
Promptly, the light signal main idea of amplifying 3 arrangements of terminals as the 1st invention, be, comprise (a) the 1st optical semiconductor amplifier element and the 2nd optical semiconductor amplifier element: the active layer that become by the pn structure is set, be used for the light signal of input amplified and wavelength conversion after export; (b) the 1st light input element: make the 1st input light of the 1st wavelength and the 2nd input light of the 2nd wavelength be input to above-mentioned the 1st optical semiconductor amplifier element; (c) the 1st wavelength is selected element: from the light from above-mentioned the 2nd wavelength of selection the light of above-mentioned the 1st optical semiconductor amplifier element; (d) the 2nd light input element: the light of the 2nd wavelength of being selected by the 1st wavelength selection element and the 3rd input light of the 3rd wavelength are imported to above-mentioned the 2nd optical semiconductor amplifier element; (e) the 2nd wavelength is selected element: from the output light from selection the 3rd wavelength the light of the 2nd optical semiconductor amplifier element; (f) the 3rd input light intensity of the 1st input light and/or the 3rd wavelength of the output light of above-mentioned the 3rd wavelength, above-mentioned the 1st wavelength of response changes and modulated and be more than or equal to 2 times to the signal magnification of the 3rd input light of above-mentioned the 3rd wavelength.
So, from light from selected the 2nd wavelength the light of the 1st optical semiconductor amplifier element of the 2nd input light of the 1st input light and the 2nd wavelength of having imported the 1st wavelength, the 3rd input light with the 3rd wavelength, when the 2nd optical semiconductor amplifier element is imported, the output light of selected the 3rd wavelength from the light that sends from the 2nd optical semiconductor amplifier element, be that the 1st input light of above-mentioned the 1st wavelength of response and/or the 3rd input light intensity of the 3rd wavelength change and modulated light, because the signal magnification that becomes the 3rd input light of above-mentioned the 3rd wavelength is the amplifying signal more than or equal to 2 size, just can obtains to adopt control to import the light signal that light directly carries out the processing and amplifying of light signal and amplify 3 arrangements of terminals.In addition, because the 1st optical semiconductor amplifier element and the 2nd optical semiconductor amplifier element are the light amplification elements that is provided with the active layer that is become by the pn structure, so light signal is when amplifying 3 arrangements of terminal miniaturizations, and the signal magnification is higher.
Here, suitable is, the 1st of above-mentioned the 1st wavelength is imported only light modulated, the 2nd of above-mentioned the 2nd wavelength is imported only continuous light, light is only controlled in the 3rd input of above-mentioned the 3rd wavelength, the output light of above-mentioned the 3rd wavelength, the signal waveform after the input interval of this control light, modulation signal with this first input light amplify.So, the output light of the 3rd wavelength, at the input interval of control light, because becoming the 1st input light intensity of above-mentioned the 1st wavelength of response changes and the amplification light of modulation, just can obtain to adopt control input light directly the light signal that the light signal after the amplification carries out switch process to be amplified 3 arrangements of terminals.
In addition, suitable is that above-mentioned the 3rd wavelength is identical wavelength with above-mentioned the 1st wavelength.So, because amplify the 1st input light and the 3rd input light of the signal input light of 3 arrangements of terminals as light signal, with output light is identical wavelength, can connect a plurality of light signals with common wavelength and amplify 3 arrangements of terminals, can adopt a plurality of light signals to amplify 3 arrangements of terminals and constitute the high integration light circuit.
In addition, suitable is, the output light of above-mentioned the 3rd wavelength is value more than or equal to 10 to the magnification of the signal of the control light of above-mentioned the 3rd wavelength.So, to amplify the signal magnification of 3 arrangements of terminals higher for light signal.
In addition, suitable is that the active layer of above-mentioned optical semiconductor amplifier element is made of quantum well or quantum dot.So, because can adopt the optical semiconductor amplifier element with the active layer that is made of quantum well or quantum dot, high-speed response becomes possibility.Especially adopting under the case of quantum dots, can obtain response speed more than or equal to 100GHz.In addition, if adopt strained super lattice as active layer, then polarization dependence has just diminished.
In addition, suitable is, above-mentioned optical semiconductor amplifier element, and end face setting therein is in order to reflect by the reflection of light unit behind the above-mentioned active layer, by other end input input light and take out output light.So, because prolong in fact by distance, so the signal magnification is further improved by making in the active layer at a reflector element that end face possessed.In addition, because feedback effects, the degree of modulation of output signal is further improved.
In addition, suitable is, above-mentioned the 1st optical semiconductor amplifier element and/or the 2nd optical semiconductor amplifier element, end face side is provided with for catoptrical reflector element selectively therein, the optical combination of end face of its reflector element scioptics and the 1st optical semiconductor amplifier element and/or the 2nd optical semiconductor amplifier element.So, be fit to adopt lenticule in this collector lens, input light and output light pass through Optical Fiber Transmission.
In addition, suitable is that above-mentioned reflector element still reflects the light wavelength selective reflecting mirror of above-mentioned the 2nd wavelength for not reflecting the 1st input light of above-mentioned the 1st wavelength from the light that above-mentioned the 1st optical semiconductor amplifier element comes to the 2nd optical semiconductor amplifier element; Do not reflect the 2nd input light of above-mentioned the 2nd wavelength from the light that above-mentioned the 2nd optical semiconductor amplifier element comes, but reflect the light wavelength selective reflecting mirror of above-mentioned the 3rd wavelength.So, reflector element selects the wavelength selectivity catoptron of elements act to constitute by the wavelength selectivity catoptron of selecting elements act as the 1st wavelength with as the 2nd wavelength.
In addition, suitable is, at an end face of above-mentioned the 1st optical semiconductor amplifier element be used between the catoptrical reflector element, the light of above-mentioned the 1st wavelength of not transmission is set but allows light transmissive the 1st wavelength selectivity wave filter of above-mentioned the 2nd wavelength; At an end face of above-mentioned the 2nd optical semiconductor amplifier element be used between the catoptrical reflector element, the light of above-mentioned the 2nd wavelength of not transmission is set but allows the 2nd wavelength selectivity wave filter of above-mentioned control light wavelength transmission.So, above-mentioned the 1st wavelength selects element and above-mentioned the 2nd wavelength to select element to be made of the 1st wavelength selectivity wave filter and the 2nd wavelength selectivity wave filter.In addition, the 1st input light is the light of the 1st wavelength of signal light wavelength, because because of the 1st wavelength selectivity wave filter transmissive not, so can obtain better characteristic.
In addition, suitable is, above-mentioned reflector element is: select element and/or the 2nd wavelength to select elements act as above-mentioned the 1st wavelength, change the incident angle of input light and/or the shooting angle of output light by relative this reflector element, it is imported to other optical semiconductor amplifier element from predetermined optical semiconductor amplifier element.
In addition, suitable is, above-mentioned the 1st optical semiconductor amplifier element and the 2nd optical semiconductor amplifier element, and on semiconductor substrate in the formed optical waveguide, separately many groups are set, these many groups constitute one as single chip.So, light signal amplifies the monolithic construction that 3 arrangements of terminals become littler integrated single chip.
In addition, suitable is, light circulator or directivity binding member are set: the other end by above-mentioned optical semiconductor amplifier element is input in the above-mentioned optical semiconductor amplifier element input light, by the other end the photoconduction of in this optical semiconductor amplifier element, exporting to the light path different with this input light.So, the light that comes out from the other end of optical semiconductor amplifier element does not enter the optical waveguide of guiding to the input of this other end, is directed to the output waveguide of special other.
In addition, suitable is, select element or the 2nd wavelength to select the wavelength selectivity catoptron or the wavelength selectivity wave filter of elements act as above-mentioned the 1st wavelength, be multi layer film filter that becomes by the different many groups layer laminate of: grating filter, the refractive index of the refractive index cycle variation on the optical propagation direction in waveguide or optical fiber and the photonic crystal that photon band gap (photonic band gap) arranged, any formation during these are several.So, can from light, be fit to extract the 2nd wavelength or the 3rd wavelength from the 1st optical semiconductor amplifier element or the 2nd optical semiconductor amplifier element.
In addition, suitable is that above-mentioned light signal amplifies 3 arrangements of terminals, constitutes light Sheffer stroke gate, light rejection gate, light triggering loop or optical operation amplifier.So, light digital loop or optical mode are intended the loop and can be amplified 3 arrangements of terminals by above-mentioned light signal and constitute suitably.
In addition, above-mentioned light signal amplifies in 3 arrangements of terminals, also can select the 1st optical semiconductor amplifier element and the 2nd optical semiconductor amplifier element, the 1st wavelength element and the 2nd wavelength to select element and will close the formation portion product of the photo-coupler etc. of ripple, by the optical fiber of leaded light, combination such as formed optical waveguide on the light transmission material system substrate of semiconductor substrate or this sample of glass substrate to the light of these inputs.
The 2nd invention
Secondly, main idea as the 2nd invention is a kind of light signal transfer approach, a series of light signals that transmission path transmitted by being scheduled to, be sent in a plurality of transmission paths, corresponding to the transmission path that is included in the destination information in this light signal, comprise (a) input step: make a series of light signal that has been applied in above-mentioned purpose ground information, amplify the input of 3 arrangements of terminal main bodys to light signal; (b) wavelength conversion step: control light, supply with, and make the light signal of this control light wavelength amplify 3 arrangements of terminal main bodys to export from this light signal to the big 3 arrangements of terminal main bodys of above-mentioned optical signal amplifying corresponding to the wavelength of above-mentioned amplitude-modulated signal; (c) light allocation step: the light signal that amplifies 3 arrangements of terminal main bodys output from above-mentioned light signal is input to the light distributor, this light signal according to its wavelength, distribute to being connected to a plurality of light transmission paths of this light distributor.Be: amplitude-modulated signal as this destination information, be added in this a series of light signal, transmit to the indicated destination of this amplitude-modulated signal.
So, the a series of light signal that has applied above-mentioned purpose ground information amplifies the input of 3 arrangements of terminal main bodys to light signal, amplifying 3 arrangements of terminal main bodys corresponding to the control light of the wavelength of this amplitude-modulated signal to this light signal supplies with, the light signal of this control light wavelength amplifies 3 arrangements of terminal main bodys to light distributor output from this light signal, corresponding its wavelength of the light signal of this output, distributes, carries out therefrom Route Selection to a plurality of light transmission paths that are connected to the light distributor and handle.Like this, because adding, destination information is given in the light signal, amplify 3 arrangements of terminal main bodys so have the light signal of wavelength conversion function and switching function, the light signal of the wavelength that can export destination information corresponding and distributing by distributor, therefore at a high speed and small-sized route device be that light signal conveyer or optical signal repeater device become possibility.
Here, above-mentioned so-called destination information is, the link information of the routing iinformation of IP address or transmission source address, reception place address, image source Route Selection, data chainning layer etc. for example is with the related information in transmission destination of decision light signal.
Suitable is, above-mentioned a series of light signal be with smaller or equal to 90% degree of modulation by amplitude modulation.So, light signal free of losses and destination information are added reliably and are given in the light signal.
In addition, suitable is, above-mentioned a series of light signal is a packet signal, and above-mentioned purpose ground information is provided in a side of the label information or the flag information of the initial part of this packet signal.So, in the label portion or sign portion of the initial part that has been located at a series of light signal that constitutes packet signal, label information or flag information are provided by modulation.
In addition, suitable is that above-mentioned wavelength conversion step by using this control light to implement amplitude modulation to the light signal that amplifies the output of 3 arrangements of terminal main bodys from light signal, is paid new destination information again and added to this light signal.So, in conveyer, can pay and add the suitable destination of transmitting.Therefore, according to state, the state of node, the Rotorfick state of for example link, and the dynamic routing of decision transmission route is selected to possibility.
The 3rd invention
For the light signal transfer approach of above-mentioned the 2nd invention is implemented suitably, the main idea of optical signal repeater device is, between optical signal transmission network, be used for as a series of light signal after the enforcement amplitude modulation of destination information, from a network toward another network transmission path, corresponding to the transmission path transmission that is included in the destination information this light signal, be: comprise (a) control light generating apparatus: by the amplitude-modulated signal of above-mentioned a series of light signal, the control light of the wavelength of the destination that to make this amplitude-modulated signal corresponding indicated takes place; (b) light signal amplifies 3 arrangements of terminal main bodys: the above-mentioned a series of converting optical signals light signal that is above-mentioned control light wavelength; (c) light distributor:, distribute to a plurality of light transmission paths according to its wavelength ground amplify the light signal that 3 arrangements of terminal main bodys are exported from this light signal.
So, a series of light signal one after amplitude-modulated signal is applied in as destination information transmits, according to the control light generating apparatus, amplitude-modulated signal by this a series of light signal, the control light of the wavelength of the destination that to make this amplitude-modulated signal corresponding indicated takes place, amplify 3 arrangements of terminal main bodys according to light signal, this a series of converting optical signals is the light signal of above-mentioned control light wavelength, according to the light distributor, amplify the light signal that 3 arrangements of terminal main bodys are exported from this light signal, distribute to a plurality of light transmission paths according to its wavelength.Thereby, because have the light signal of wavelength conversion function and switching function amplify the wavelength that 3 arrangements of terminal main bodys can export destination information corresponding light signal, distribute by the light distributor again, therefore at a high speed and small-sized route device be that light signal conveyer or optical signal repeater device become possibility.
Suitable is that electronic-controlled installation or complete optical control device are set: according to the amplitude-modulated signal that is included in the above-mentioned light signal, by above-mentioned control light generating apparatus, the control light according to the wavelength of the indicated destination information of this amplitude-modulated signal is taken place.So, according to electronic-controlled installation or complete optical control device, because making, control control light generating apparatus takes place according to the wavelength control light that is included in the indicated destination information of amplitude-modulated signal in the light signal, so the light signal with wavelength conversion function and switching function amplify the wavelength that 3 arrangements of terminal main bodys can export corresponding destination information light signal, distribute by the light distributor again, therefore high speed and small-sized route device are that light signal conveyer or optical signal repeater device become possibility.In addition, electronic-controlled installation, extract the amplitude-modulated signal that is included in from the light signal that above-mentioned key light waveguide is imported only optically, make at the control light generating apparatus of serving as reasons under the situation of the complete optical control device that the control light corresponding to the wavelength of this address signal takes place, because the electromagnetic wave corresponding to the signal beyond the address signal does not take place, the concealed advantage of guaranteeing light signal is arranged.
In addition, suitable is (a) optical branching filter to be set: the part of above-mentioned light signal is carried out branch; (b) photosignal transducer: is the converting optical signals by this branch of optical branching filter institute electric signal and supplying with to above-mentioned electronic-controlled installation; (c) light delay element: be located at than above-mentioned optical branching filter downstream more, make to be input to the light signal that light signal amplifies in the 3 arrangements of terminal main bodys by this optical branching filter and to postpone; Above-mentioned electronic-controlled installation extracts the amplitude-modulated signal that is included in the above-mentioned light signal, makes the control light corresponding to the wavelength of the indicated destination information of this amplitude-modulated signal, is taken place by above-mentioned control light generating apparatus.So, because have the light signal of wavelength conversion function and switching function amplify the wavelength that 3 arrangements of terminal main bodys can export destination information corresponding light signal, distribute by the light distributor again, so high speed and small-sized route device are that light signal conveyer or optical signal repeater device become possibility.
In addition, suitable is, the light signal memory element of temporary transient storage by the optical packet signal that above-mentioned smooth distributor distributed is set, with make the light signal of being exported by this light signal memory element feed back to the light feedback transmission path of input side, above-mentioned electronic-controlled installation, be used to make under the temporary transient storage condition of above-mentioned light signal, output is used to make this optical packet signal to be transformed to the control light signal of predefined storage with wavelength; Above-mentioned optical branching filter being transformed to the optical packet signal of this storage after with wavelength, distributes to above-mentioned light signal memory element, makes it in this temporary transient storage.So, at a plurality of optical packet signals of relay process under same transmission path output situation, one side's optical packet signal is transformed to predefined storage wavelength, optical branching filter is being transformed to the optical packet signal of this storage after with wavelength, distribute to above-mentioned light signal memory element, make it after this temporary transient storage, to feed back to input side, the advantage that can carry out relay process is again arranged.
In addition, suitable is, above-mentioned light signal memory element, in order to receive the light signal that distributes by above-mentioned smooth distributor, possess the different a plurality of optical fiber of optical spread length arranged side by side, above-mentioned electronic-controlled installation, according to, the storage time of the above-mentioned optical packet signal necessity that should temporarily store, output is transformed to the control light signal of predefined storage with wavelength in order to make this optical packet signal, above-mentioned smooth distributor, being transformed to the optical packet signal of this storage after with wavelength, any distribution to a plurality of optical fiber of above-mentioned light signal memory element makes it in this temporary transient storage.So, optical packet signal in a plurality of optical fiber of side by side configuration, in optical fiber, in the process of propagating and be temporarily stored according to its necessary storage time.
In addition, suitable is that above-mentioned complete optical control device comprises photo-coupler: the part of above-mentioned the 1st input light is carried out branch; Continuous light source: the continuous light with the identical wavelength of above-mentioned control light takes place; Photo-coupler: close ripple the continuous light that comes from this continuous light source with from the above-mentioned the 1st part of importing light that this photo-coupler comes; With the optical semiconductor amplifier element: receive the control light that the light output that comes from this photo-coupler has the modulation signal that is comprised above-mentioned the 1st input light, to compare response speed slow with above-mentioned optical semiconductor amplifier element.So, just constitute full photosensitiveness and learned control device.
In addition, suitable is, above-mentioned smooth distributor amplifies the output light that 3 arrangements of terminals are exported if be transfused to from above-mentioned light signal, then the output light of this input, in above-mentioned a plurality of light transmission paths to corresponding to the light transmission path of above-mentioned control light wavelength, optionally distribute.For example, this light distributor is the arrayed waveguide grating type channel-splitting filter, setting be connected input port the 1st plane (slab) waveguide, be connected the 2nd slab guide of a plurality of output ports and between these the 1st slab guides and the 2nd slab guide set different a plurality of Waveguide arrays of length, this be input to the input light of input port, by each wavelength, distribute to above-mentioned a plurality of output ports.Perhaps, comprise diffraction grating type or prism-type light distributor: utilize the diffraction grating that has nothing in common with each other according to every kind of wavelength or the refraction angle of prism, a plurality of Waveguide arrays that input light is arranged to array-like to carry out the selectivity distribution.So, corresponding to the output light of the control light wavelength of exporting from above-mentioned light 3 arrangements of terminals, carry out selectivity by this each wavelength any in a plurality of branch-waveguides and distribute.
The 4th invention
The main idea of the 4th invention is, a kind of can the storage from the light signal imported of input light transmission path, and the light signal memory storage that can take out at any time, be to comprise: (a) control light generating apparatus: generation is used for the light signal that handle is imported from above-mentioned input light transmission path, is transformed to corresponding to the control light that is included in transmission destination and identical or different with the above-mentioned light signal wavelength in this input signal; (b) light signal amplifies 3 arrangements of terminal main bodys: receive above-mentioned light signal of importing and control light, exporting behind the light signal of this converting optical signals of importing for this control light wavelength; (c) light distributor: amplifying the light signal that 3 arrangements of terminal main bodys are exported from this light signal, distribute according to the wavelength of this light signal; (d) light buffer-stored element: temporarily storing with the light signal of wavelength by the storage that this light distributor distributed; (e) light feedback transmission path:, amplify the input of 3 arrangements of terminal main bodys to light signal once more, and this light signal is fed back to above-mentioned input light transmission path in order to make the light signal of being exported from this light buffer-stored element; (f) light signal storage control unit: be used in amplify in 3 arrangements of terminal main bodys, light distributor, light buffer-stored element and this light feedback transmission path round-robin light signal repeatedly at above-mentioned light signal, amplify the control light that is transformed to output usefulness wavelength in the 3 arrangements of terminal main bodys at this light signal, take place from above-mentioned control light generating apparatus.
According to this 4th invention, amplify in 3 arrangements of terminal main bodys, light distributor, light buffer-stored element and this light feedback transmission path round-robin light signal repeatedly at above-mentioned light signal, if amplify in the 3 arrangements of terminal main bodys at light signal, take out control module by light signal and be transformed to the output wavelength, then distribute to taking out with wavelength based on this output, can (take out constantly) the take-off time light signal arbitrarily thus with transmission path by divider.The taking-up transmission path is here handled the light signal that (so-called light adds processings) or partial wave processing (so-called light subtracts processing) taken out and is prepared in order for example to close ripple.
Here, in above-mentioned the 4th invention, suitable is, above-mentioned light signal storage control unit, be used in to the wavelength conversion of the light signal of the big 3 arrangements of terminal main bodys input of above-mentioned optical signal amplifying for storage with the control light of wavelength, take place from above-mentioned control light generating apparatus.So, by amplifying at light signal in the 3 arrangements of terminal main bodys, the converting optical signals of being imported is the storage wavelength, make it circulation in the circle transmission path of process repeatedly by amplifying at light signal in 3 arrangements of terminal main bodys, light distributor, light buffer-stored element and this light feedback transmission path, and begin the storage of this light signal.
In addition, suitable is, for the increase and decrease of the gain that suppresses above-mentioned circulating optical signal for example increases or decays, further comprise the light signal that control is fed back by above-mentioned smooth feedback transmission path or supply with the optical signal gain control module that above-mentioned light signal amplifies the control light of 3 arrangements of terminal main bodys.So, then the gain of this light signal can be kept necessarily by the caused decay of the circulation of light signal because can prevent.
In addition, suitable is, above-mentioned light signal amplifies 3 arrangements of terminal main bodys to be possessed, and above-mentioned converting optical signals is made it anti-phase for the 1st optical semiconductor amplifier element of biasing (bias) light wavelength with making it anti-phase the 2nd optical semiconductor amplifier element of above-mentioned control light wavelength that is by the anti-phase converting optical signals of the 1st optical semiconductor amplifier element; Above-mentioned optical signal gain control module is based on the increase and decrease of the gain of the bias lighting that is comprised from the output light of the 2nd optical semiconductor amplifier element, the light signal that control is fed back by light feedback transmission path.For example, make attenuated optical signal or amplification based on the increase of the gain of bias lighting or minimizing by light feedback transmission path feedback.So, because, amplify, can prevent the decay that this optical signals circulation causes thus, so the gain of this light signal can be kept substantially necessarily by the optical signal gain control module by the light signal of light feedback transmission path feedback.
In addition, suitable is, above-mentioned optical signal gain control module comprises, the 1st gain control light amplifier element: receive above-mentioned bias lighting and with the gain control light of the continuous light of this bias lighting different wave length, the gain control light that output gains and reduces along with the increase of the gain of this bias lighting; With the 2nd gain control light amplifier element: receive the output light exported with the light amplifier element from the 1st gain control and by the light signal of above-mentioned smooth feedback transmission path feedback, gain along with the minimizing of this gain control light light signal of increase of output.So, by complete optical processing, the gain of the round-robin light signal for storage can be kept necessarily.
In addition, suitable is, above-mentioned the 1st gain control is made of the light amplification element that constitutes by the light transmission medium that makes the rare earth element transition constitute the energy energy level of 3 energy levels system or 4 energy levels system with light amplifier element and/or the 2nd gain control light amplifier element.Such light amplification element is because the response time of mutual gain modulation is slow, so the decline of smoothedization of signal content of round-robin light signal, its gain or rising can detect easily.
In addition, suitable is, above-mentioned optical signal gain control module comprises, optical operation control device: for the gain of keeping above-mentioned round-robin light signal certain, based on the increase and decrease of the gain of the light signal that is fed back by above-mentioned smooth feedback transmission path, control supplies to the gain that above-mentioned light signal amplifies the control light of 3 arrangements of terminal main bodys.So, amplify the light signal that 3 arrangements of terminal main bodys are exported from light signal, based on the minimizing of the gain of this light signal of feedback, amplify by complete optical arithmetic unit and can prevent the decay that causes by circulation of this light signal, so the gain of this light signal can be kept necessarily substantially.
In addition, suitable is that (a) electronic-controlled installation: be used to control above-mentioned control light generating apparatus is set; (b) photosignal transducer:, be transformed to electric signal and supply with above-mentioned electronic-controlled installation light signal by this branch of optical branching filter institute; (c) light delay element: the downstream that is arranged on above-mentioned optical branching filter, make and be input to the light signal that above-mentioned light signal amplifies in the 3 arrangements of terminal main bodys by this optical branching filter and postpone, (d) above-mentioned electronic-controlled installation, response is supplied with or is included between the indicated period of output of storage signal output information the above-mentioned light signal from the outside, by above-mentioned control light generating apparatus, be used in above-mentioned converting optical signals is taken place for the control light of output with wavelength.So, by electronic processing, response is supplied with or is included between the indicated period of output of storage signal output information the above-mentioned light signal from the outside, makes the light signal output of storing by circulation.
In addition, suitable is, complete optical operation control device is set: response is supplied with or is included between the indicated period of output of storage signal output information the above-mentioned light signal from the outside, by above-mentioned control light generating apparatus, is used in above-mentioned converting optical signals is the control light generation of output with wavelength.So, by complete optical processing, response is supplied with or is included between the indicated period of output of storage signal output information the above-mentioned light signal from the outside, makes the light signal output of storing by circulation.
Description of drawings
Fig. 1 is that the light signal of explanation one embodiment of the present of invention amplifies the block diagram of the formation of 3 arrangements of terminals.
Fig. 2 is a stereographic map of representing the profile under the situation that light amplification element in the embodiment in figure 1 is made of the optical semiconductor amplifier element.
Fig. 3 is the sequential chart that the light signal of key diagram 1 amplifies the work of 3 arrangements of terminals; Epimere is represented the waveform of the 1st input light; The waveform of light is represented to control in the stage casing; Hypomere represents to export the waveform of light.
Fig. 4 is the figure that the light signal of presentation graphs 1 amplifies the input-output characteristic of 3 arrangements of terminals.
Fig. 5 is the figure that the light signal of presentation graphs 1 amplifies the output signal frequency characteristic of 3 arrangements of terminals.
To be expression amplify the figure in the light trigger loop that 3 arrangements of terminals are constituted by the light signal of Fig. 1 to Fig. 6; (a) the light trigger loop that constitutes by a pair of smooth Sheffer stroke gate of expression; (b) the light trigger loop that constitutes by a pair of smooth rejection gate of expression.
To be expression amplify the figure of the optical operation amplifying return circuit that 3 arrangements of terminals constitute by the light signal of Fig. 1 to Fig. 7.
Fig. 8 is other the figure that is equivalent to Fig. 1 of formation of embodiment that the explanation light signal amplifies 3 arrangements of terminals.
Fig. 9 is other the figure that is equivalent to Fig. 1 of formation of embodiment that the explanation light signal amplifies 3 arrangements of terminals.
Figure 10 illustrates that the light signal with Fig. 9 amplifies the figure that 3 arrangements of terminals form the formation under the single chip architecture situation.
Figure 11 be light signal amplify 3 arrangements of terminals other embodiment, be the figure that is equivalent to Fig. 1 that explanation adopts 4 terminal type light circulators to constitute.
Figure 12 illustrates that the light signal with Figure 11 amplifies the figure that 3 arrangements of terminals form the formation under the single chip architecture situation.
Figure 13 be light signal amplify 3 arrangements of terminals other embodiment, be the figure of formation of the single chip architecture of the explanation V-shape optical waveguide that is provided with epitaxial growth on semiconductor substrate.
Figure 14 is other the figure that is equivalent to Fig. 1 of formation of embodiment that the explanation light signal amplifies 3 arrangements of terminals.
Figure 15 be light signal amplify 3 arrangements of terminals other embodiment, be the figure of formation of the single chip architecture of the explanation V-shape optical waveguide that is provided with epitaxial growth on semiconductor substrate.
Figure 16 is the sketch map of formation of optical signal repeater device of an embodiment of the explanation device that adopts optical signal transmission method.
Figure 17 is one of them the block diagram of configuration example of a plurality of repeaters of a part of the optical signal repeater device of the explanation embodiment that constitutes Figure 16.
Figure 18 is the block diagram of formation of the repeater of explanation Figure 17.
Figure 19 is the block diagram of configuration example of the control light generating apparatus of explanation Figure 18.
Figure 20 is other the block diagram of configuration example of the control light generating apparatus of explanation Figure 18.
Figure 21 is other the block diagram of configuration example of the control light generating apparatus of explanation Figure 18.
Figure 22 is that the light signal of explanation Figure 18 amplifies the block diagram of the configuration example of 3 arrangements of terminals.
Figure 23 is that the light signal of explanation Figure 22 amplifies the sequential chart of the work of 3 arrangements of terminals; Epimere represents to import the waveform of the flashlight of light; The waveform of light is represented to control in the stage casing; Hypomere represents to export the waveform of light.
Figure 24 is that the light signal of expression Figure 22 amplifies the figure of the frequency characteristic of 3 arrangements of terminals.
Figure 25 is the figure of configuration example of the light distributor of explanation Figure 22.
Figure 26 is the figure of configuration example of a series of input optical signal of explanation Figure 23.
Figure 27 is a series of input optical signal to Figure 26, adopt to constitute its main signal and the sequential chart that describes of amplitude-modulated signal.
Figure 28 is the sequential chart of explanation about the work under the ground of the not attached purpose in the work of the repeater main part of Figure 18 of a series of input optical signal of Figure 26 the information state.
Figure 29 is explanation about the sequential chart of the work under the work of the repeater main part of a series of input optical signal of Figure 26, additional and the destination information situation that input optical signal is inequality.
Figure 30 be full optical profile type that the explanation light signal amplifies 3 arrangements of terminals take place control light other embodiment formation figure, be the figure that is equivalent to Figure 22.
Figure 31 is that the light signal of explanation Figure 30 amplifies the sequential chart of the work of 3 arrangements of terminals.
Figure 32 be the explanation comprise Figure 30 embodiment wavelength converting device the optical signal repeater device formation figure, be the figure that is equivalent to Figure 17.
Figure 33 be the key component among other the embodiment of explanation optical signal repeater device be repeater figure, be the figure that is equivalent to Figure 18.
Figure 34 is the sketch map of formation of an embodiment of explanation light signal memory storage.
Figure 35 is the sketch map of formation of the embodiment of inequality other of explanation and the light signal memory storage of Figure 34.
Figure 36 is the sequential chart of light signal storage work of the light signal memory storage of explanation Figure 35.
Figure 37 is explanation is not provided with the light signal storage work under the feedback light multiplying arrangement situation in the light signal memory storage of Figure 35 a sequential chart.
Figure 38 is the sketch map of formation of the embodiment of inequality other of the light signal memory storage of explanation and Figure 34, Figure 35.
Embodiment
Below, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 to Figure 15 represents to amplify the relevant actual example of 3 arrangements of terminals with light signal, and Fig. 1 represents that the light signal of one of them embodiment amplifies 3 arrangements of terminals 10.
Among Fig. 1, the 1st LASER Light Source 12 is exported for example the 1st wavelength X of 1555nm 1The 1st laser (the 1st input light) L 1, make it by being provided with the optical fiber F of the 1st photomodulator 14 1Propagate.The 2nd LASER Light Source 16 is exported for example the 2nd wavelength X of 1548nm continuously with certain intensity 2The 2nd laser (the 2nd input light) L 2, make it pass through the 2nd optical fiber F 2Propagate.Above-mentioned the 1st LASER Light Source 12 for example adopts, and variable wavelength semiconductor laser, the 2nd LASER Light Source 16 adopt for example semiconductor laser of single wavelength.Above-mentioned the 1st photomodulator 14, according to from the electric signal that does not have illustrated signal generator or light signal, for example shown in the waveform of the epimere of Fig. 3 this sample, to as the 1st laser L by light 1Carry out the feasible pulse signal that becomes the frequency of this electric signal or light signal of intensity modulated.The 1st photo-coupler 18, have function as the 1st light input element, above-mentioned optical fiber F 1And optical fiber F 2To optical fiber F 3Connect, passing through these optical fiber F 1And optical fiber F 2The 1st laser L that propagates and come 1And the 2nd laser L 2Carry out overlapping (closing ripple), pass through the 3rd optical fiber F 3And the 1st light circulator 20 to the input of the 1st light amplification element 26.
Above-mentioned the 1st light amplification element 26, constitute by optical semiconductor amplifier element for example shown in Figure 2 (SOA:semiconductor optical amplifier).
Among Fig. 2, by compound semiconductor for example the semiconductor substrate 26a that constituted of indium phosphide (InP) or gallium arsenide (GaAs) go up the optical waveguide 26b that forms, be on this semiconductor substrate 26a, and form the semi-conductive multilayer film of III-V family mix-crystal of for example InGaAsP, GaInNAs, the AlGaInp etc. of predetermined waveguide figure by photoetching by the extension generation; Adopt for example photoetching to form the fillet of preset width.This optical waveguide 26b, because be by the material higher than the refractive index of semiconductor substrate 26a constitute, so have the function that makes light be enclosed in thickness direction and propagate.In in the multilayer film in above-mentioned optical waveguide 26b, comprise the active layer 26c that becomes by the pn structure, cap rock etc., be fixedly connected with upper electrode 26e thereon.This active layer 26c, by being added with voltage outside between fixedly connected lower electrodes 26f of the lower surface of semiconductor substrate 26a and above-mentioned upper electrode 26e and flowing through in above-mentioned pn knot that exciting current forms electronics, the hole is right, the light by this active layer 26c since the induction radiation function amplify.Above-mentioned active layer 26c is made of multiple quantum trap, strained super lattice or quantum dot.Under the multiple quantum trap situation, for example by from InP semiconductor substrate 26a epitaxial growth and the InGaAs (thickness 100 ) of lattice coupling and 6 pairs of formations of InGaAsP (thickness 100 ), on this active layer 26c, set gradually the guide layer (2000 ) that composition (refractive index) is gradient index (GRIN) structure of ladder variation.The device length (optical path length) of this active layer 26c is 600 μ m; Can think, for example the energy that causes by the current value of 250mA inject institute's injected electrons because of the induction of passing through that photon produced radiate, when valence band moves, emit luminous energy and make by light amplification.According to injecting, at wavelength 1555nm place for example, obtain the gain about 20dB by the caused energy of the current value of this 250mA.
In 1 end face of above-mentioned the 1st light amplification element 26, because be provided with the reflector element 26d of the metal film of implementing catoptrical processing by splash-proofing sputtering metal or dielectric or dielectric multilayer film etc., therefore by the other end that is positioned at and this 1 end face is an opposition side, carry out light input or light output.Thereby, above-mentioned the 1st laser L 1And the 2nd laser L 2Close the glistening light of waves, be input in the 1st light amplification element 26 by above-mentioned other end, and by the light of above-mentioned reflector element 26d reflection once more by this other end output.In the active layer 26c of the 1st light amplification element 26, because above-mentioned the 1st laser L 1Incident, produce with this wavelength X 1Be the natural light of wavelength around the center, this natural light and the 1st laser L 1Intensity modulated increase and decrease intensity inversely.If the 2nd wavelength X in the wavelength coverage that makes under this state at this natural light 2The 2nd laser L 2By, the 2nd wavelength X then 2, be subjected to variation identical and enhancing with this natural light.Promptly, be subjected to and the 1st laser L 1Modulation phase with but anti-phase modulation and amplifying.Promptly, the 1st light amplification element 26, the cross-gain modulating characteristic that possesses in company with the 2nd light amplification element 34 is mutual gain modulation characteristic.
The 1st light circulator 20, the light from 26 outputs of the 1st light amplification element, the 3rd optical fiber F does not lead 3, and guiding is provided with the 4th optical fiber F that the 1st wavelength is selected element 28 4The 1st wavelength is selected element 28, is connected to above-mentioned the 1st light amplification element 26, from the light of being exported by the 1st light amplification element 26, be extracted as the 2nd wavelength X 2The light of 1548nm.The 1st wavelength is selected element 28, has the function as the optical filter element, is by for example local irradiation ultraviolet ray, makes the 4th optical fiber F 4A part in the longitudinal direction refractive index be periodically variable fiber grating filter, select with the 2nd wavelength X 2For centre wavelength and half breadth be the light of 1nm make it by.Moreover the 1st wavelength is selected element 28, and any of the multi layer film filter that can be formed by refractive index many groups layer laminate inequality, the photonic crystal with photon band gap constitutes.
The 2nd photo-coupler 30 has the function as the 2nd light input element, the 2nd wavelength X of selecting element 28 by above-mentioned the 1st wavelength and selecting from the light that the 1st light amplification element 26 is exported 2Light and the waveform in the stage casing of for example Fig. 3 shown in be the 3rd wavelength X 3The 3rd laser L of control light 3Overlapping (closing ripple) is by the 5th optical fiber F 5And the 2nd light circulator 32, to 26 same the 2nd light amplification elements 34 inputs that constitute of the 1st light amplification element.In the 2nd light amplification element 34, the 2nd wavelength X after the modulation 2, according to the 2nd wavelength X 2Be the 3rd wavelength X in the wavelength coverage of the natural light at center 3Control light further modulated, the 3rd wavelength X 3Be the waveform as shown in the hypomere of Fig. 3.The 2nd light circulator 32, the light from 34 outputs of the 2nd light amplification element, the 5th optical fiber F does not lead 5, and guiding is provided with the 6th optical fiber F of the 2nd optical filter element 36 6Above-mentioned the 2nd optical filter element 36 is selected the 3rd wavelength X from the light by 34 outputs of the 2nd light amplification element 3Light, as the output light L shown in the hypomere of Fig. 3 4Output.In Fig. 3, at the control light L shown in the waveform in stage casing 3The line of solid line, single-point, dotted line, corresponding at the output light L shown in the hypomere 4The line of solid line, single-point, dotted line, output light L 4Control light L relatively 3Have an appointment 30 times gain (magnification).
Fig. 4 and Fig. 5 represent that the light signal of above-mentioned this sample formation amplifies the characteristic of the mutual gain modulation type wavelength conversion effect of 3 arrangements of terminals 10.Fig. 4 is at the 1st laser L by expression the 1st input light 1Signal intensity P INTransverse axis and the 4th laser L of expression output light 4Signal intensity P OUTThe two-dimensional coordinate that the longitudinal axis constituted in, with control light L 3Signal intensity P cThe 4th laser L for parameter 4Input-output characteristic figure.As by obvious this sample of figure, identical with 3 terminal amplifier elements of transistor etc., the 4th laser L of output light 4Signal intensity P OUT, response control light L 3Signal intensity P cVariation, and this variation is modulated with being exaggerated; And respond the 1st laser L of the 1st input light 1Signal intensity P INVariation, and this variation is modulated with being exaggerated.In addition, Fig. 5 is at the 1st laser L by expression the 1st input light 1The transverse axis of frequency and the 4th laser L of expression output light 4The two-dimensional coordinate that the longitudinal axis constituted of signal degree of modulation H (%) in, represent the 4th laser L 4Frequency characteristic.According to Fig. 5, until 5GHz, all do not see the reduction of signal degree of modulation H.Above-mentioned signal degree of modulation H is represented by for example following formula (1).Wherein, I MaxBe maximal value, the I of light signal MinIt is the minimum value of light signal.In addition, in above-mentioned active layer 26c, adopt under the situation of quantum dot, in scope, do not see the reduction of signal degree of modulation H more than or equal to 100GHz.
H＝100×(I max-I min)/(I max+I min)…(1)
In addition, according to the inventor's experiment, by above-mentioned control light L 3From the 3rd wavelength X 3To the 1st wavelength X 1Change, can obtain the 1st wavelength X 1Output light L 4, and can obtain amplifying the result of effect with above-mentioned same light signal.In addition, above-mentioned in, though the 2nd laser L 2The 2nd wavelength X 2Be than the 1st laser L 1Short wavelength is even but the 2nd laser L 2The 2nd wavelength X 2Be than the 1st laser L 1Long wavelength, also can obtain amplifying the result of effect with above-mentioned same light signal, moreover, can also obtain, for example the minimum of the waveform of the hypomere of image pattern 3 is such near zero, output light L 4Baseline and the 1st laser L 1Similarly near zero further effect.If in addition the 1st wavelength X 1The 1st input light L 1With the 2nd wavelength X 2The 2nd laser L 2In the same manner as continuous light (bias lighting), apply signal and be modulated to the 3rd wavelength X 3The 3rd input light L 3In, the 3rd wavelength X then 3Output light L 4, with the 3rd input light L 3The magnification more than 10 times or 10 times of signal amplify and export.
Fig. 6 (a) expression is by 2 triggering loops 42 that light Sheffer stroke gate 40 is constituted of adopting above-mentioned light signal to amplify 3 arrangements of terminals 10; The triggering loop 46 that Fig. 6 (b) expression is made of 2 light rejection gates 44.Sheffer stroke gate in the electronic loop and rejection gate, constitute by a plurality of transistors as everyone knows, replace this transistor, above-mentioned light signal is amplified 3 arrangements of terminals 10 be arranged in the light circuit and constituted light Sheffer stroke gate 40 and rejection gate 44, by this 1 pair of light Sheffer stroke gate 40 and a pair of smooth rejection gate 44, constitute and trigger loop 42 and trigger loop 46.By this trigger loop 42 and trigger loop 46, by optical storage information.
Fig. 7 represents to adopt above-mentioned light signal to amplify the optical operation amplifier 48 of 3 arrangements of terminals 10.Operational amplifier in the electronic loop, constitute by a plurality of transistors as everyone knows, replace this transistor, be arranged on and constitute optical operation amplifier 48 in the light circuit by above-mentioned light signal being amplified 3 arrangements of terminals 10.
More than the light signal of the Fig. 1 of Gou Chenging amplifies in 3 arrangements of terminals 10, has imported the 1st wavelength X making from coming from 1The 1st input light L 1With the 2nd wavelength X 2The 2nd input light L 2The light of the 1st light amplification element 26 in the 2nd selected wavelength X 2Light and the 3rd wavelength X 3The 3rd input light (control light) L 3, when the input of the 2nd light amplification element 34, from the light that comes out by the 2nd light amplification element 34, selected the 3rd wavelength X 3Output light L 4, be above-mentioned the 1st wavelength X of response 1The 1st input light L 1And/or the 3rd wavelength X 3The 3rd input light L 3Strength Changes and light after modulating because become with respect to the 3rd wavelength X 3The 3rd input light (control light) L 3The signal magnification be amplifying signal more than or equal to 2 sizes, so the light signal that can obtain adopting control input light just can directly carry out the processing and amplifying of light signal amplifies 3 arrangements of terminals 10.
In addition, the light signal according to present embodiment amplifies 3 arrangements of terminals 10, above-mentioned the 1st wavelength X 1The 1st input light L 1Be light modulated, above-mentioned the 2nd wavelength X 2The 2nd input light L 2Be continuous light, above-mentioned the 3rd wavelength X 3The 3rd input light L 3Be control light, above-mentioned the 3rd wavelength X 3Output light L 4, at this control light L 3Input interval in, have the 1st input light L 1The signal waveform of modulation signal after amplifying; So the 3rd wavelength X 3Output light L 4, at control light L 3Input interval in, become the response the 1st wavelength X 1The 1st input light L 1Strength Changes and modulated amplification light; Therefore can obtain adopting the light signal of the switch process of the light signal after control input light just can directly amplify to amplify 3 arrangements of terminals 10.
In addition, at present embodiment, because above-mentioned the 1st wavelength X 1With the 3rd wavelength X 3Also can pretend the 1st input light L that amplifies the input light of 3 arrangements of terminals 10 for light signal for same wave is long 1And the 3rd input light L 3, become and export light L 4Identical wavelength connects a plurality of light signals with same wavelength and amplifies 3 arrangements of terminals 10 and become possibility, adopts a plurality of light signals to amplify 3 arrangements of terminals 10, can constitute the high light circuit of integrated level.
In addition, at present embodiment, because above-mentioned the 2nd wavelength X 2Can be for than above-mentioned the 1st wavelength X 1Long wavelength, in this case, the input of the 1st after modulation light L 1The output light L of amplification light 3The waveform of expression, have become and the baseline of the waveform of the 1st input light similarly near the baseline advantage of zero level.Promptly, there is degree of modulation to become big advantage.
In addition, at present embodiment, because the 3rd wavelength X 3Output light L 4For the 3rd wavelength X 3Control light 3 the signal magnification, be value more than or equal to 10, the enlarging function of 3 arrangements of terminals is higher so light signal amplifies, its range of application is extended.
In addition, at present embodiment, the 1st light amplification element 26 and the 2nd light amplification element 34 are because be the optical semiconductor amplifier element that is provided with the active layer 26c that is become by the pn structure, so can access the signal magnification and the higher light signal of response speed amplifies 3 arrangements of terminals 10.
In addition, at present embodiment, the active layer 26c of the 1st light amplification element 26 and the 2nd light amplification element 34 because be made of quantum well or quantum dot, amplifies 3 arrangements of terminals 10 so can access the light signal with higher signal magnification and faster response speed.Especially adopting under the situation of quantum dot, can obtain response speed more than or equal to 100GHz.In addition, adopt strained super lattice as active layer, then polarization dependence just diminishes.
In addition, at present embodiment, because the 1st light amplification element 26 and the 2nd light amplification element 34, in order to reflect light, the reflector element 26d by formed catoptrons such as metal evaporation etc. to be set on an one end face by active layer 26c, by other end input input light and taking-up output light, make in active layer 26c by the reflector element 26d of the catoptron that is arranged on an end face etc. to prolong, so the signal magnification is higher by distance is substantive.In addition, because feedback effects, degree of modulation are higher.
In addition, at present embodiment, because light circulator 20 and 32 are set, other end by the 1st light amplification element 26 and the 2nd light amplification element 34 is input to wherein input light, the photoconduction by the output of this other end to this input light different light paths, so from the light of the other end output of the 1st light amplification element 26 and the 2nd light amplification element 34, do not enter into that guiding makes its optical waveguide of importing to this other end and the output waveguide of being led special other.
In addition, at present embodiment, the 1st wavelength selects element 28 and/or the 2nd wavelength to select element 36, because this in several any of the photonic crystal that is periodically variable grating filter, multi layer film filter that many groups layer laminate that refractive index is different forms and photon band gap is arranged by refractive index on the optical propagation direction in waveguide or optical fiber is constituted, so can be from the light of the 1st light amplification element 26 or the 2nd light amplification element 34, extract the 2nd wavelength X suitably 2Perhaps the 3rd wavelength X 3
In addition, above-mentioned light signal amplifies 3 arrangements of terminals 10, and the light that can constitute light Sheffer stroke gate 40, is made of this a pair of smooth Sheffer stroke gate 40 triggers loop 42 or optical operation amplifier 46, can improve the function of PIC photon integrated circuit.
In addition, in the 1st light amplification element 26 of present embodiment, the 2nd wavelength X 2It is the 1st wavelength X 1The 1st input light L 1The wavelength coverage of ambient light in wavelength; In the 2nd light amplification element 34, the 3rd wavelength X 3It is the 2nd wavelength X 2Input light wavelength scope in wavelength; So, can make the 2nd wavelength X that is included in from the output light of the 1st light amplification element 26 or the 2nd light amplification element 34 2Perhaps the 3rd wavelength X 3Signal, amplify suitably.
In addition, be arranged on the reflector element 26d of an end face of the 1st light amplification element 26, by making the 1st wavelength X 1Transmittance but reflect the 2nd wavelength X 2Light wavelength selective reflection film situation about constituting under, then do not need the 1st wavelength to select element 28.With the reflector element of the 2nd light amplification element 34 of the 1st light amplification element 26 identical formations, by making the 2nd wavelength X 2Transmittance but reflect the 3rd wavelength X 3Light wavelength selective reflection film (wavelength selectivity catoptron) situation about constituting under, then do not need the 2nd wavelength to select element 36.Above-mentioned wavelength selectivity reflectance coating is made of the dielectric multilayer film of the different mutual lamination of dielectric layer of for example refractive index.
Below, other embodiment is described.Also have, in the following description, omitting explanation with the same part of the above embodiments, additional same symbol.
Fig. 8 represents that other the light signal of embodiment that above-mentioned light signal amplifies 3 arrangements of terminals 10 amplifies the key component of the configuration example of 3 arrangements of terminals 50.The wavelength converting device 50 of present embodiment makes the half-reflecting mirror 51 by playing the 1st light input element effect and the light signal L of collector lens 52 A, to a side's of the 1st light amplification element 26 end face input, from the opposing party's of the 1st light amplification element 26 end face by the light of collector lens 53 outputs, the 1st wavelength X 1Transmittance, but bias lighting L 2Wavelength X bLight, turn back to the 1st light amplification element 26 by plaing the 1st wavelength to select wavelength selection type mirror 54 reflections of element effect.From the light of a side's of the 1st light amplification element 26 end face output, by above-mentioned half-reflecting mirror 51 reflections and by the half-reflecting mirror 55 that plays the 2nd light input element effect with control light L CClose ripple, incide a side's of the 2nd light amplification element 34 end face by collector lens 56.In from the opposing party's of this 2nd light amplification element 34 end face, light by collector lens 57 outputs, make bias lighting L 2Wavelength X bTransmittance, but and control light L CFor identical wavelength components, select wavelength selection type mirror 58 reflections of element effect to turn back to the 2nd light amplification element 34 by playing the 2nd wavelength.The output light L that comes out from one end face of the 2nd light amplification element 34 3, and amplify the identical of 3 arrangements of terminals 10 by above-mentioned light signal.According to the wavelength converting device 50 of such formation, can obtain amplifying the wavelength conversion effect and the light amplification effect of the identical mutual gain modulation type of 3 arrangements of terminals 10 with above-mentioned light signal.Above-mentioned wavelength selectivity catoptron 58 and wavelength selection type catoptron 54 are by collector lens 57 and collector lens 53, with the optical combination of end face of the end face and the 1st light amplification element 26 of the 2nd light amplification element 34.Above-mentioned collector lens 52, collector lens 53, collector lens 56, collector lens 57 are made of for example lenticule, above-mentioned light signal L A, output light L 3Deng by Optical Fiber Transmission.Also have, half-reflecting mirror 51 and 55 also can be replaced by photo-coupler or light circulator.
Fig. 9 represents that other the light signal of embodiment that above-mentioned light signal amplifies 3 arrangements of terminals 10 amplifies the key component of the configuration example of 3 arrangements of terminals 59.The light signal of present embodiment has amplified arrangements of terminal 59 and has been provided with, the 1st light amplification element 26 and the 2nd light amplification element 34 that series connection sets; Photo-coupler 60 and 61: make light signal L AAnd bias lighting L b(wavelength X b) incide the inner side end of the 1st light amplification element 26; Wavelength selectivity reverberator 62: in light, make the 1st wavelength X from the outside end face of the 1st light amplification element 26 1Transmittance but make wavelength X bThe one-tenth sub reflector and turn back in the 1st light amplification element 26; Wave filter 63: from the light of the inner side end outgoing of the 1st light amplification element 26, make wavelength X bComposition by inciding the inner side end of the 2nd light amplification element 34; Photo-coupler 64: make control light L CIncide the outside end face of the 2nd light amplification element 34; With wave filter 65: from the light of the outside end face outgoing of the 2nd light amplification element 34, make and control light L CBe the transmittance of same wave long component, and as output light L 3Output.Above-mentioned photo-coupler 60 and 61 works as the 1st light input element, and above-mentioned photo-coupler 64 works as the 2nd light input element, and above-mentioned reverberator 62 and wave filter 65 select element and the 2nd wavelength to select elements act as the 1st wavelength.According to the wavelength converting device 59 of such formation, can obtain amplifying the wavelength conversion effect and the light amplification effect of the identical mutual gain modulation type of 3 arrangements of terminals 10 with above-mentioned light signal.Above-mentioned control light L CWavelength X CLight signal, export by wave filter 63 reflection and transmission filter 65.Wavelength X bLight component transmission filter 65 not.Above-mentioned photo-coupler 60 and 61 also can be made of a photo-coupler.
Figure 10 represents, on semiconductor substrate 26a, above-mentioned light signal amplify 3 arrangements of terminals 59, with the 1st light amplification element 26 identical single chip architectures with single chip architecture shown in Figure 2 be a slice structure, the example that constitutes.Light signal at the single chip architecture of present embodiment amplifies in 3 arrangements of terminals 59, the position between outer fix, the 1st light amplification element 26 and the 2nd light amplification element 34 of the 1st light amplification element 26 and the outer fix of the 2nd light amplification element 34 set gradually the reverberator that grating constituted 62, wave filter 63 and wave filter 65 by the refractive index cycle variation.Also have, make, corresponding to above-mentioned photo- coupler 60 and 61 and photo-coupler 64 from a pair of branch-waveguide of the optical waveguide 26b branch of linearity.
Figure 11 has represented that other the light signal of embodiment that above-mentioned light signal amplifies 3 arrangements of terminals 10 amplifies the key component of the configuration example of 3 arrangements of terminals 66.The wavelength converting device 66 of present embodiment possesses: the 1st light amplification element 26 of a pair of reflection-type and the 2nd light amplification element 34; Have the 2nd terminal 67b that comprises the 1st light amplification element 26 that is connected to this a pair of reflection-type and the 2nd light amplification element 34 and the 3rd terminal 67c 4 terminals, between this 4 terminal, transmit light, make from the emergent light of predetermined terminal with to the optical path of incident light of this terminal 4 terminal type light circulators 67 inequality; Photo-coupler 68: light signal L AAnd bias lighting L b(wavelength X b) close ripple after, incide the 1st terminal (the 1st port) 67a of 4 terminal type light circulators 67; With photo-coupler 69: control light L CClosing ripple arrives by the wavelength X of reflection-type the 1st light amplification element 36 to the 2nd port 67b of 4 terminal type light circulators 67 bLight in and it is incided the 2nd light amplification element 34; Make from the 4th port 67d of 4 terminal type light circulators 67 with control light L CThe transmittance of same wave long component.At the reflecting surface of above-mentioned the 1st light amplification element 26, be provided with and allow the 1st wavelength X 1Transmittance but selective reflecting the 2nd wavelength X bReflection of light film 26d, make the 2nd wavelength X in the end face setting of above-mentioned the 2nd light amplification element 34 bTransmittance reflection and control light L CBe identical wavelength X cThe reflection of light film 34d of component.Light signal according to such formation amplifies 3 arrangements of terminals 66, can obtain amplifying with above-mentioned light signal the wavelength conversion effect and the light amplification effect of the identical mutual gain modulation type of 3 arrangements of terminals 10, and because can be by 4 terminal type light circulators 67 so export light L 3Degree of modulation improve.The light signal of present embodiment amplifies 3 arrangements of terminals 66 and amplifies 3 arrangements of terminals 10 with the light signal of Fig. 1 and compare, and the simple advantage of formation is arranged.Also have, above-mentioned photo-coupler 69 also can be control light L CClose ripple to by the 3rd port 67c of 4 terminal type light circulators 67 wavelength X to the 2nd light amplification element 34 bLight in and make it incide the 2nd light amplification element 34.In the present embodiment, photo-coupler 68 and photo-coupler 69, play the 1st light input element and the 2nd light input element, reflectance coating 26d and 34d, play the 1st wavelength and select element and the 2nd wavelength to select element.
Figure 12 represents that above-mentioned light signal amplifies 3 arrangements of terminals 66 and is the example under the single chip architecture situation.The light signal of this single chip architecture amplifies 3 arrangements of terminals 66, with the same shown in above-mentioned Fig. 6, Figure 10, also possesses formed optical waveguide 26b on semiconductor substrate 26a.This optical waveguide 26b is provided with the part that is used to bring into play with the Z word shape of 4 terminal type light circulators, 67 same functions; With the effect that is used to bring into play photo-coupler 68 and photo-coupler 69 and from the branch-waveguide of its a part of branch.Inflection point in the part of the Z of above-mentioned optical waveguide 26b word shape, a pair of reflection-type the 1st light amplification element 26 and the 2nd light amplification element 34 are with the formation similarly shown in above-mentioned Fig. 2, Figure 10.Also have, reflectance coating 26d and 34d are arranged on the outer face of this reflection-type the 1st light amplification element 26 and the 2nd light amplification element 34.
Figure 13 has represented that other the light signal of embodiment that above-mentioned light signal amplifies 3 arrangements of terminals 10 amplifies the key component of the configuration example of 3 arrangements of terminals 70.The light signal of present embodiment amplifies 3 arrangements of terminals 70, and the 1st optical waveguide 72 and the 2nd optical waveguide 73 are set: the alloy semiconductor layer by the pn knot layer (active layer) with for example GaInNAs of generating on the rectangular shaped semiconductor 71 of for example GaAs etc. etc. forms V word shape by photoetching; The 1st light amplification element the 26, the 2nd light amplification element 34: do not have illustrated electrode to be provided with by in the 1st optical waveguide 72 and the 2nd optical waveguide 73, being provided with; Wavelength selectivity reflectance coating 74: be arranged on a cross part end face, above-mentioned the 1st optical waveguide 72 and above-mentioned the 2nd optical waveguide 73 of above-mentioned rectangular shaped semiconductor substrate 71, to the 2nd optical waveguide 73 reflection bias lighting L bThe 2nd wavelength X bLight and control light L C, make light signal L AThe 1st wavelength X 1The light selective transmission; Wavelength selectivity reflectance coating 75: be arranged on an outgoing side end face, above-mentioned the 2nd optical waveguide 73 of above-mentioned rectangular shaped semiconductor substrate 71, reflect the 2nd wavelength X bLight, make and control light L CThe transmittance of identical wavelength components.Light signal L AWith bias lighting L b, close the end face that incides optical waveguide 72 behind the ripple by photo-coupler 76, control light L C, incide in the 2nd optical waveguide 73 from the photo-coupler 77 in the outside that is arranged on above-mentioned wavelength selectivity reflectance coating 75.Light signal according to such formation amplifies 3 arrangements of terminals 70, can obtain amplifying with above-mentioned light signal the wavelength conversion effect and the light amplification effect of the identical mutual gain modulation type of 3 arrangements of terminals 10.In addition, the light signal of present embodiment amplifies 3 arrangements of terminals 70, by will have by the III-V family of the GaInNAs that for example on the rectangular shaped semiconductor substrate of GaAs etc., generates etc. mix the alloy semiconductor layer of the pn knot layer (active layer) that crystalline semiconductor layer constituted, by photoetching treatment and affix electrode and singualtion, so the advantage that has very small dimensions to constitute.At present embodiment, above-mentioned photo-coupler 76 and photo-coupler 77, work, above-mentioned wavelength selectivity reflectance coating 74 and wavelength selectivity reflectance coating 75, select element and the 2nd wavelength to select elements act as the 1st wavelength as the 1st and the 2nd light input element.
Figure 14 has represented that other the light signal of embodiment that above-mentioned light signal amplifies 3 arrangements of terminals 10 amplifies the key component of the configuration example of 3 arrangements of terminals 78.The light signal of present embodiment amplifies 3 arrangements of terminals 78, by as the photo-coupler 80 that closes photo-coupler 79 that the ripple element uses, uses as light partial wave element and collector lens 52, with light signal L ABe input to a square end face of the 1st light amplification element 26, from the opposing party's end face of the 1st light amplification element 26 light, above-mentioned light signal L by collector lens 53 outputs AWavelength X 1Can not be by wavelength selectivity wave filter 81 transmissions (absorption), but the wavelength X of bias lighting bLight, this wave filter 81 of transmission and turn back to the 1st light amplification element 26 by 82 reflections of fully-reflected type catoptron.Propagate to other photo-coupler 83 from above-mentioned photo-coupler 80 from the light that a square end face of the 1st light amplification element 26 is exported, close ripple with control light LC at this.Then, by photo-coupler 84 and collector lens 56, a side's of incident the 2nd light amplification element 34 end face.From the light that the opposing party's end face of the 2nd light amplification element 34 is exported by collector lens 57, the wavelength X of bias lighting bLight can not be by wavelength selectivity wave filter 85 transmissions (being absorbed), and with control light L CBe identical wavelength X cComposition this wavelength selectivity wave filter 85 of transmission and turned back to the 2nd light amplification element 34 then by fully-reflected type catoptron 86 reflection.The output light L that comes out from a square end face of the 2nd light amplification element 34 3, by photo-coupler 84, to for example following light distributor 150 outputs in outside.Light signal according to such formation amplifies 3 arrangements of terminals 78, not only can obtain amplifying with above-mentioned light signal the wavelength conversion effect and the light amplification effect of the identical mutual gain modulation type of 3 arrangements of terminals 10, and light signal L AWavelength X 1, absorb and transmissive not by wavelength selectivity wave filter 81, thus, the ratio of feeding back the 1st light amplification element 26 sides is minimum, the advantage that has characteristic further to improve.In the present embodiment, photo-coupler 79 and photo-coupler 84, work, above-mentioned wavelength selectivity wave filter 81 and wavelength selectivity wave filter 85, select element and the 2nd wavelength to select elements act as the 1st wavelength as the 1st light input element and the 2nd light input element.
Figure 15 is other the embodiment that above-mentioned light signal amplifies 3 arrangements of terminals 10, has represented on monolithic, a plurality of (in the present embodiment being 2) light signal amplifies 3 arrangements of terminals, the 88 integrated key components that turn to the configuration example of single chip architecture.Many groups light signal of present embodiment amplifies 3 arrangements of terminals 88, possess the 1st optical waveguide the 90, the 2nd optical waveguide 91 and the 3rd optical waveguide 92 respectively: the alloy semiconductor layer of the pn knot layer (active layer) that will generate on the rectangular shaped semiconductor substrate 89 of for example GaAs etc., have GaInNAs for example etc. forms wire, forms V word shape with 1 couple of mutual neighbour through the opposing party's end face from a square end face by photoetching; The 1st light amplification element the 26, the 2nd light amplification element 34 and the 3rd light amplification element 93: do not have illustrated electrode to be provided with by in the 1st optical waveguide the 90, the 2nd optical waveguide 91 and the 3rd optical waveguide 92, being provided with; With wavelength selectivity reflectance coating (wavelength selectivity mirror body) 94: be arranged on be above-mentioned rectangular shaped semiconductor substrate 89 an end face, through above-mentioned the 1st optical waveguide 90 and the cross part of the 2nd optical waveguide 91 and the outgoing side end face of above-mentioned the 3rd optical waveguide 92, reflect bias lighting L to the 2nd optical waveguide 91 bThe 2nd wavelength X bLight and control light L C, but make light signal L AThe 1st wavelength X 1Light and control light L CSelective transmission; With wavelength selectivity reflectance coating (wavelength selectivity mirror body) 95: being arranged on is an outgoing side end face end face, above-mentioned the 2nd optical waveguide 91 of above-mentioned rectangular shaped semiconductor substrate 89, allows the 2nd wavelength X bTransmittance but to reflection of the 3rd optical waveguide 92 and control light L CThe light of same wave long component.Light signal L AWith bias lighting L b, close the end face that incides the input side of the 1st optical waveguide 90 behind the ripple by photo-coupler 96, control light L C, incide in the 2nd optical waveguide 91 from the outside of above-mentioned wavelength selectivity reflectance coating 94.Light signal according to such formation amplifies 3 arrangements of terminals 88, can obtain amplifying with above-mentioned light signal the wavelength conversion effect and the light amplification effect of the identical mutual gain modulation type of 3 arrangements of terminals 10.In addition, the light signal of present embodiment amplifies 3 arrangements of terminals 88, because will have by the III-V family of the GaInNAs that for example on the rectangular shaped semiconductor substrate of GaAs etc., generates etc. mix the alloy semiconductor layer of the pn knot layer (active layer) that crystalline semiconductor layer constitutes, by photoetching treatment and affix electrode and singualtion, so light signal amplify 3 arrangements of terminals 10 can carry out the light signal of 1.3 mum wavelength bands for example signal Processing, the advantage of the formation of very small dimensions is arranged.In addition,, do not need circulator, and obtain high output by 3 light amplification elements 26,34,93 according to present embodiment.At present embodiment, photo-coupler 96 works as the 1st light input element, and wavelength selectivity reflectance coating 94 is selected elements act as the 2nd light input element and the 1st wavelength, and wavelength selectivity reflectance coating 95 is selected elements act as the 2nd wavelength.
Figure 16 to Figure 33 represents, the light signal transfer approach, be used for implementing suitably this light signal transfer approach, the light signal route is the embodiment that optical signal repeater (transmission) device is associated, according to these, make by a series of light signal of predetermined transmission path, among a plurality of transmission paths, transmit, can carry out the optical communication that high-level information is handled thus corresponding to the transmission path that is included in the destination information in this light signal.
Figure 16 summary is represented, is provided in the input optical fibre F of the many transmission paths in the optical-fiber network A1To F AM, and another optical-fiber network in the output optical fibre F of many transmission paths B1To F BMBetween, make by input optical fibre F A1To F AMWavelength multiplexing light signal (laser) L of any transmission A1To L AM, to the output optical fibre F that determines according to the destination information that is added to this light signal by amplitude modulation B1To F BMAny in the optical signal repeater (transmissions) of a transmission of wavelength bus install 110.This optical signal repeater device 110 is also referred to as optical signal-routing device.
In Figure 16, by above-mentioned input optical fibre F A1To F AMThe light signal L of any transmission A1To L AM, be wavelength-division multiplex (WDM) signal respectively, be superimposed with predefined multi-wavelength's light signal.Thereby, be included in for example light signal L A1The a series of wavelength X of predetermined wavelength 1Light signal L A11, according to by carrying out the destination information that amplitude modulation is set, to output optical fibre F in for example this label portion or sign portion B1To F BMAny optical fiber F BIn any wavelength bus, promptly with predefined multiple be the wavelength X of N kind 1To λ NIn any wavelength transmit.By output optical fibre F B1To F BM, the light signal of wavelength multiplexing (laser) L B1To L BMTransmission respectively.
Above-mentioned optical signal repeater device 110 is provided with M optical branching filter (AWG:ArrayedWaveguide Grating, array waveguide grating) S 1To S M: being the input optical fibre F of M root by predetermined radical A1To F AMThe light signal L of the wavelength multiplexing of transmission A1To L AM, be separated into N kind wavelength X respectively by the signal of every kind of wavelength 1To λ NEach a series of light signal (grouping), for example about light signal L A1, make it be separated to L respectively A11To L A1NM the 1st repeater R 1To M repeater R M: make wavelength X 1To λ NA series of light signal (bag) L A11To L A1N, carry out wavelength conversion according to being added to destination information wherein by amplitude modulation, and, constitute in the same manner mutually by additional original destination information of amplitude modulation or new destination information; Wave multiplexer (AWG) T with M 1To T M: be used for handle by the 1st repeater R 1To M repeater R MThe light signal of being exported closes ripple, with its guiding output optical fibre F B1To F BM
Figure 17 is in order to illustrate the 1st repeater R of above-mentioned mutual identical formation 1To M repeater R MFormation, to be arranged on for example input optical fibre F of correspondence A1With output optical fibre F B1Between the 1st repeater R of position 1For representing, illustrate its formation.In Figure 17, the 1st repeater R 1In, by the 1st repeater main part RB is set 11To RB 1N: from input optical fibre F A1The light signal L of the wavelength multiplexing of transmission A1, by optical branching filter S 1, according to the wavelength X of N kind 1To λ NA series of light signal (bag) L that is separated into A11To L A1N, by optical fiber F A11To F A1NInput is then according at this light signal L A11To L A1NLabel portion or sign portion in, additional by amplitude modulation and destination information that set makes wavelength conversion and enforcement is exported with above identical expression destination information or new destination information amplitude modulation, the individual mutual identical formation of N.From the 1st repeater main part RB 11M repeater main part RB 1NThe wavelength X of Shu Chu N kind respectively 1To λ NAny output signal of wavelength, respectively by being used to transmit light signal, making N * M root crosslinking optical fiber F according to its wavelength and destination information branch 111To F 1NMN * M root crosslinking optical fiber F N11To F NNMWith wave multiplexer T 1To T MConnect.Thus, the 1st repeater main part RB 11M repeater main part RB 1NOutput signal, by wave multiplexer T 1To T M, at output optical fibre F B1To F BMAmong, with the output optical fibre transmission of the wavelength of expection to expection.Constitute other repeater R MRepeater main part RB M1To RR MNToo, respectively by N * M root crosslinking optical fiber F 111To F 1NMN * M root crosslinking optical fiber F N11To F NNMWith wave multiplexer T 1To T MConnect.Also have, as shown in figure 17, transmit for example wavelength X of identical wavelength 1The crosslinking optical fiber F of signal 111, F 211... F N11The output terminal combination, by optical fiber F B11Be input to wave multiplexer T 1In.Transmission wavelength λ NThe crosslinking optical fiber F of signal 1n1, F 2n1... F NN1The output terminal combination, by optical fiber F Bn1Be input to wave multiplexer T 1In.
Above-mentioned optical branching filter S 1, well-known, for example, the light partial wave loop that utilizes the interference filter equiwavelength selective reflecting/transmission film of diffraction grating or prism equal angles dispersive element, dielectric multilayer film or optical waveguide shape partial wave loop etc. to constitute.In addition, above-mentioned wave multiplexer T 1, by for example, with the lenticule be the main composition element light direction in conjunction with loop, many side by side the distribution mating type recovery of a part of local combination of the optical fiber of configuration with coupling mechanism, utilize to recover with coupling mechanism etc. and constitute in the concentrated mating type of the multipath reflection of the inwall of quadrangular tube or the mixing in the surface plate.
In addition, above-mentioned the 1st repeater main part RB 11, for example constitute as shown in figure 18.In Figure 18, by optical fiber F A11By optical branching filter S 1The light signal L of input A11, connected the 1st photo-coupler 114 of optical couplers, WDM, dual-wavelength effect successively, light delay element 116, and gain modulation type wavelength converting device (optical switch device, light signal amplify 3 arrangements of terminal main bodys) 118 mutually.Above-mentioned the 1st photo-coupler 114 is by with the duplexure of optical fiber as main body, with the formations such as duplexure of lenticule as main body.With the duplexure of optical fiber as main body, predetermined interval by for example making a pair of optical fiber, twist the state that connects mutually and engage each other closely, the reflectance coating that can carry out transmission and reflection is arranged on the take-off point of optical fiber and constitutes to engage each other closely parallel state or spiral fashion.With the duplexure of lenticule, adopt to make by for example focusing rod lens the light of parallel beamization utilize wedge type plane of refraction or reflecting surface and branch constitutes as main body.The 1st photo-coupler 114 here can contrary property because have both sides tropism, thus when lightray propagation in the other direction the time, play a part light signal closed ripple and opposite direction is transferred to the interior wave multiplexer of the 1st optical fiber 112.
In addition, light delay element 116 makes above-mentioned optical fiber F A11In light signal, the delay scheduled time only of transmission, by setting propagation distance and constitute in the optical fiber ground of the predetermined length of for example reeling by the propagation time delay of propagating this propagation distance of being scheduled to.Try to achieve by experiment the time delay of this light delay element 116 in advance, so that in wavelength converting device 118, carries out the control phototiming of light signal with the transmission destination of this light signal of expression of wavelength conversion herein.
By above-mentioned the 1st photo-coupler 114 from optical fiber F A11In the branched optical cable signal of light signal branch, by optical fiber 120 and connected photosignal transducer 122, supply with to electronic-controlled installation 124.Electronic-controlled installation 124 is utilized the temporary transient memory function of RAM and is constituted according to the so-called microcomputer that is stored in the routine processes input signal among the ROM in advance by for example CPU.This electronic-controlled installation 124, according to the indicated coded signal of amplitude modulation that is included in the light signal that is transmitted by optical fiber 120 is destination information, for this light signal of route, the wavelength commands signal corresponding to this destination information is supplied with to control light generating apparatus 126.For example, electronic-controlled installation 124 only extracts and is included in the light signal L that is imported from optical fiber 120 A11In amplitude-modulated signal, by control light generating apparatus 126, make with corresponding to taking place with the corresponding control light LC of the wavelength of the indicated destination information of this amplitude modulation, therefore by signal Processing, the electromagnetic wave corresponding to address signal signal in addition do not take place.
Above-mentioned control light generating apparatus 126 has the predefined multi-wavelength λ of output CControl light L CThe control light source, according to from the command signal of above-mentioned electronic-controlled installation 124, promptly according to light signal L 1In branch information and the wavelength commands signal selected, the wavelength X that has corresponding to this branch information CControl light L C, above-mentioned wavelength converting device 118 is supplied with.Control light generating apparatus 126 makes corresponding to the output optical fibre F that transmits the destination B1To F BMAmong wavelength X radical, a multiple for example N kind of wavelength bus C1, λ C2, λ C3... λ CNControl light L C, select a ground or optionally take place.Figure 19, Figure 20, Figure 21 represent the configuration example of this control light generating apparatus 126 respectively.
In Figure 19, control light generating apparatus 126 is by a plurality of LASER Light Source 126 of the light of the different monochromatic wavelength of the mutual wavelength of the corresponding control of output light source L1To 126 Ln, be located at these LASER Light Source 126 respectively L1To 126 LnOutgoing side, by the output light of their output individual photomodulator 126 of the plural number of switch (N) respectively M1To 126 MnWith passing through those photomodulators 126 M1To 126 MnLight close ripple, and as the monochromatic light wave multiplexer 126 of control light output SConstitute; By LASER Light Source 126 L1To 126 LnAnd photomodulator 126 M1To 126 Mn, according to working from the branch instruction signal of electronic-controlled installation 124, output is according to being included in light signal L A11In the indicated destination information (branch information) of amplitude-modulated signal and the wavelength X selected CControl light L CAs above-mentioned a plurality of LASER Light Source 126 L1To 126 Ln, adopt for example semiconductor laser diode.In Figure 20, control light generating apparatus 126 is by the corresponding a plurality of LASER Light Source 126 of controlling the light of the different single wavelength of the mutual wavelength of light source of output L1To 126 Ln, from those LASER Light Source 126 L1To 126 LnUnicity optical multiplexer 126 in photosynthetic ripple to a waveguide of being exported SAnd be arranged on this optical multiplexer 126 SOutput light of coming from its output of outgoing side, switch and interdict and hide from view (blanking) interval single photomodulator 126 MConstitute; By LASER Light Source 126 L1To 126 LnAnd photomodulator 126 M, according to working from the branch instruction signal of electronic-controlled installation 124, output is according to being included in light signal L A11In branch information and the wavelength X selected CControl light L CAt Figure 21, control light generating apparatus 126 is by the Wavelength variable LASER Light Source 126 that can change the output light wavelength LvAnd be arranged on this Wavelength variable LASER Light Source 126 LvOutput light of coming from its output of outgoing side, switch and interdict unicity photomodulator 126 between blanking zone MConstitute; By Wavelength variable LASER Light Source 126 LvAnd photomodulator 126 M, according to working from the branch instruction signal of electronic-controlled installation 124, output is according to being included in light signal L 1In branch information and the wavelength X selected CControl light L CAbove-mentioned Wavelength variable LASER Light Source 126 LV, can adopt for example distributed Blatt reflective type laser, micromachine surface light emitting laser, thermal tuning DFB laser etc.In distributed Blatt reflective type laser, feed electric current in the DBR layer (Bragg reflecting layer) of a side among a pair of catoptron that is configured for constituting this optical resonator, cause that by Bragg effect the refractive index of this part changes, that the photoresonance wavelength is become is variable.In miniature type machinery surface light emitting laser, by miniature type machinery cause the optical resonator length variations, the photoresonance wavelength becomes variable thus.In thermal tuning DFB laser, by temperature cause variations in refractive index, thus the photoresonance wavelength to be become variable.Also has above-mentioned photomodulator 126 M1To 126 Mn, 126 MBy the semi-conductor type photomodulator that for example drive current or driving voltage is added to pn knot portion and transmitted light output is closed, or apply driving voltage from the outside to the material with electrooptical effect of these samples of single crystals such as lithium columbate crystal and the formations such as external modulation type photomodulator that transmitted light output is closed.
The above-mentioned optical wavelength conversion device 118 of above-mentioned Figure 18, also the light distributor 150 of selecting elements act as the 2nd wavelength in the lump, constitute light signal and amplify 3 arrangements of terminals 128, any of amplifying 3 arrangements of terminals 10,50,59,66,70,78,88 etc. to light signal shown in Figure 15 with Fig. 1, Fig. 8 constitutes in the same manner basically.The optical wavelength conversion device 118 of present embodiment constitutes: this sample for example shown in Figure 22, series connection is provided with a pair of the 1st light amplification element 136 and the 2nd light amplification element 144 corresponding to a plurality of light amplification elements that utilize the cross-gain modulating characteristic to export by the light amplification and the wavelength conversion of 112 inputs of the 1st optical fiber, amplify light signal by 112 inputs of above-mentioned the 1st optical fiber, and with corresponding to the control light L that is included in the branch information in this light signal CInput synchronously, output and should control light L CThe light L of identical wavelength 3That is, in Figure 22, LASER Light Source 130 is made of the semiconductor laser of for example single wavelength, makes than light signal L 1The wavelength X of (the 1st input light) 1The long wavelength X of 1555nm for example 2The laser of 1565nm (the 2nd input light) L for example 2, export continuously with certain intensity.The 3rd photo-coupler 132 works as the 1st light input element, the above-mentioned light signal L in the 1st optical fiber 112 of being transmitted in of amplitude modulation 1, and be the above-mentioned laser L of continuous light 2Overlapping (closing ripple), and pass through the 1st light circulator 134 to 136 inputs of the 1st light amplification element.
Above-mentioned the 1st light amplification element 136 and the 2nd light amplification element 144, also same with the 1st light amplification element 26 shown in Figure 2, constitute by optical semiconductor amplifier element (SOA).Above-mentioned the 1st light amplification element 136 because at an one end face, be provided with the reflector element 136d that implements mirror that catoptrical end face handles etc. by sputter etc., by being positioned at and another end face of this end face opposition side, carrying out light input or light output.Thereby, light signal L 1(the 1st input light) and than its wavelength X of growing 2Laser L 2(the 2nd input light) close the glistening light of waves, be input in the 1st light amplification element 136 by above-mentioned other end, and export by this other end once more by the light of above-mentioned reflector element 136d reflection.In the active layer of the 1st light amplification element 136 and the 1st light amplification element 26 shown in Figure 2 same, be subjected to and light signal L 1The same but anti-phase modulation of phase place of modulation and amplify, from 136 outputs of the 1st light amplification element.That is, the 1st light amplification element 136 and the 2nd light amplification element 144 are in the lump, to possess the cross-gain modulating characteristic be mutual gain modulation characteristic.
In Figure 22, the 1st light circulator 134, light from 136 outputs of above-mentioned the 1st light amplification element, the 3rd photo-coupler 132 that do not lead, and the 1st wavelength that leads is selected element 138.The 1st wavelength is selected element 138, from the light by 136 outputs of above-mentioned the 1st light amplification element, extract the 2nd wavelength X 2Be the light of 1565nm.The 1st wavelength is selected element 138, work as filter element, by by for example with ultraviolet local irradiation, and a part that makes optical fiber in the longitudinal direction the fiber grating color filter of refractive index cycle variation constitute, select with the 2nd wavelength X 2For centre wavelength and half breadth are that the light of for example 1 to tens nm is by its transmission.Also have, the 1st wavelength is selected element 138, also can any formation of the photonic crystal of photon band gap be arranged by the multi layer film filter of refractive index many groups layer laminate one-tenth inequality.
The 4th photo-coupler 140 is reinstated as the 2nd light input element, the 2nd wavelength X of selecting among the light that will select element 138 to be exported from the 1st light amplification element 136 by above-mentioned the 1st wavelength 2Light and as the 3rd wavelength X 3The control light L of laser COverlapping (closing ripple) is by the 2nd light circulator 142, to importing with the 1st light amplification element 136 same the 2nd light amplification elements 144 that constitute.The 2nd wavelength X of modulation in the 1st light amplification element 136 2, in the 2nd light amplification element 144, by with the 2nd wavelength X 2Be the 3rd wavelength X in the wavelength coverage of the natural light at center 3Control light L C, further modulated and amplified output wavelength λ 2Light and become control light L CLight modulated (output light signal) L of wavelength 3Mixed light.The 2nd light circulator 142 is the above-mentioned mixed light (wavelength X from 144 outputs of the 2nd light amplification element 2Light and light modulated L 3), not to 140 outputs of the 4th photo-coupler, and to 150 outputs of light distributor.
Be included in the light modulated L from the light of above-mentioned the 2nd light amplification element 144 outputs 3, because be and control light L CThe 3rd identical wavelength X of wavelength 3Light, therefore if control light L CWavelength for example be changed to λ C1, λ C2, λ C3... λ CN, then from the light L of the 2nd light amplification element 144 3Wavelength also for example be changed to λ C1, λ C2, λ C3... λ CNFigure 23, sample plot, expression makes respectively and is the above-mentioned light signal L of the represented waveform of section thereon 1The control light L of (the 1st input light), the waveform represented in this stage casing CDuring input, the output light L of light distributor 150 4Waveform.Control light L CStrength Changes, the output light L of the light distributor 150 shown in the corresponding hypomere 4Amplitude modulation, the output light L of this light distributor 150 4Control light L relatively CHave an appointment 2 times to 30 times gain (magnification).In addition, output light L 4Phase place and above-mentioned light signal L 1(the 1st input light) is identical, and phase place is not anti-phase.
Figure 24 represents, amplified in the wavelength converting device 118 and light distributor 150 that 3 arrangements of terminals 128 work as light signal by above-mentioned the formation, and the active layer of the 1st light amplification element 136 constitutes characteristic under the situation by quantum dot.In Figure 24, at flashlight L by expression the 1st input light A11The transverse axis and the expression output light L of frequency 4The two-dimensional coordinate that constitutes of the longitudinal axis of signal degree of modulation H (%) in, represent this output light L 4Frequency characteristic.According to this Figure 24, until find out that all signal degree of modulation H less reduces about 100GHz.Above-mentioned signal degree of modulation H is by for example preceding formula (1) expression.
Be fed back into Figure 18, from the light modulated L in the light of above-mentioned wavelength converting device 118 3, promptly control light L by this wavelength CWavelength X C(=λ C1, λ C2..., λ Cn) by light distributor 150 corresponding a plurality of waveguides ground, respectively optionally to predetermined crosslinking optical fiber F 111To F 11M, F 121To F 12M... F 1N1To F 1NMDistribute.In addition, from the light of wavelength converting device 118 and this wavelength X CDifferent wavelength X 2Light, be assigned to branch optical fiber F B0Because this branch optical fiber F A0Terminal be not linked to back level and close, so wavelength X 2The propagation of light be prevented from this.Like this, light distributor 150 is also as from from selecting the 3rd wavelength X the light of the 2nd light amplification element 144 CThe 2nd wavelength of output light select elements act.
In above-mentioned smooth distributor 150, for example, light modulated L 3Be control light L CWavelength X CIn a kind of monochromatic light situation under, to crosslinking optical fiber F 111To F 11M, F 121To F 12M... F 1N1To F 1NMAmong a group select a property distribution, but be under 2 kinds of color mixture situations, to crosslinking optical fiber F 111To F 11M, F 121To F 12M... F 1N1To F 1NMAmong any two groups distribute.Above-mentioned smooth distributor 150, for example shown in Figure 25, the 1st slab guide 150b that is connected to input port 150a is set; Be connected to the 2nd slab guide 150d of a plurality of output port 150c; Be arranged on the different a plurality of Waveguide array 150e of length between the 1st slab guide 150b and the 2nd slab guide 150d; With the crosslinking optical fiber F that is connected respectively to a plurality of output port 150c 111To F 11M, F 121To F 12M... F 1N1To F 1NM, by being input to the light modulated L of this input port 150a from wavelength converting device 118 3(input light), be crosslinking optical fiber F by its wavelength to any of a plurality of output port 150c 111To F 11M, F 121To F 12M... F 1N1To F 1NMAmong the arrayed waveguide grating type optical branching filter of any distribution constitute.Also have, above-mentioned smooth distributor 150 possesses on demand and is used to make branched optical cable optically focused to crosslinking optical fiber F 111To F 11M, F 121To F 12M... F 1N1To F 1NMThe optical systems such as collector lens of end face.At present embodiment, above-mentioned control light generating apparatus 126, wavelength converting device 118 and light distributor 150 constitute optical signal repeater device main part RB 1Main key component.
Figure 26 is that expression is by input optical fibre F A1The transmission and by channel-splitting filter S 1The wavelength X of separating 1Light signal L A11The figure that constitutes of concept nature, Figure 27 is explanation, to this flashlight L A11Carry out the waveform after the amplitude modulation and it is carried out the figure of the step of amplitude modulation.At Figure 26, light signal L A11, be a series of signal that for example is called grouping, at its start-up portion or fore-end, the initial part H of the topic start information of title that grouping is provided, date, filename, page number etc. is set; Labeling section (label portion) LA with the signal that the destination information of representing the transmission source or sending the IP address of destination, the routing iinformation of this sample of image source route, link information of data link layer or the like is provided.Light signal L A11, as shown in figure 27, by implementing amplitude modulation, giving the ground of the above-mentioned purpose at least information among initial part H or the label portion LA.Wavelength converting device 118 for example shown in Figure 22 or following amplitude modulator shown in Figure 30 are adopted in this amplitude modulation, by advancing the modulation signal shown in the 2nd section portion and carry out the main signal shown in the epimere portion of Figure 27 being overlapping.
Figure 28 is, the work of the optical repeater 110 of the present embodiment that as above constitutes, with the 1st repeater main part RB for example shown in Figure 180 11The sequential chart that describes for representative.At the 1st repeater main part RB 11In, the light signal L shown in the epimere portion of Figure 28 A11Import (input step) by light delay element 116 to wavelength converting device 118 on the one hand, on the other hand by the 1st photo-coupler 114, this light signal L A11A part be transformed to electric signal by photosignal transducer 122 and supply with to electronic-controlled installation 124, supply with to control light generating apparatus 126 by the modulated pulse signal (destination information) shown in the 2nd section portion of Figure 28 that this electronic-controlled installation 124 extracts, from wavelength X this control light generating apparatus 126, that determine according to the indicated destination information of this modulated pulse signal CControl light L C, this sample takes place shown in the 3rd section portion of Figure 28, synchronously is input to the light signal L of wavelength converting device 118 with this generation A11In wavelength converting device 118, be transformed to control light L CWavelength X CAnd export (wavelength conversion step).By above-mentioned light delay element 116, light signal L A11Only postpone, corresponding to the time of computing working time of carrying out the electronic-controlled installation 124 after the light-to-current inversion by photosignal transducer 122 etc., thus carry out above-mentioned synchronously.Be included in for example light signal L A11In amplitude-modulated pulse method P 1Purpose of indicating ground information, be wavelength X 1The wavelength bus situation under, wavelength X 1Control light L CGeneration, light signal L A11As Figure 28 by this sample shown in following 2 sections orders, be transformed to wavelength X 1From wavelength converting device 118 outputs.In addition, be included in light signal L A11In amplitude-modulated pulse light signal P 1Purpose of indicating ground information, be wavelength X 2The wavelength bus situation under, wavelength X 2Control light L CGeneration, light signal L A11Shown in the hypomere portion of Figure 28 this sample, be transformed to wavelength X 2From wavelength converting device 118 outputs, press its Wavelength Assignment (light allocation step) by light distributor 150.Here, because the light signal L of input light A11Be set at the saturated gain of output of the 1st light amplification element 136, so the light signal of selecting element 138 to export, import to the 2nd light amplification element 144 by the 1st wavelength from the 1st light amplification element 136 is certain size, certain from the output of the 2nd light amplification element 144, optical signal amplitude behind the wavelength conversion of light distributor 150 inputs, so amplitude modulation is just easily.In the wavelength converting device 118 of the optical repeater 110 of present embodiment, input light light signal L A11Signal and output light L 3Perhaps L 4Signal between, phase place is not anti-phase, this light signal L A11Wavelength, if in the gain margin of the 1st light amplification element 136, select any wavelength all good, the high advantage of degree of freedom arranged.
Figure 29 is, above-mentioned optical repeater 110 other work promptly and wavelength conversion carry out mark simultaneously and the work of exporting, with the 1st repeater main part RB for example shown in Figure 180 11Be representative, the sequential chart that describes.At the 1st repeater main part RB 11In, the light signal L shown in the epimere portion of Figure 29 A11Import to wavelength converting device 118 on the one hand by light delay element 116, on the other hand by the 1st photo-coupler 114 with this light signal L A11A part be transformed to electric signal by photosignal transducer 122 and supply with to electronic-controlled installation 124, will supply with to control light generating apparatus 126 by the modulated pulse signal (destination information) shown in the 2nd section portion of Figure 29 that this electronic-controlled installation 124 extracts.In control light generating apparatus 126, according to the wavelength X of this modulated pulse signal purpose of indicating ground information decision CControl light L CSynchronous with this generation, as to be input to wavelength converting device 118 light signal L takes place A11Be transformed to control light L CWavelength X CAnd export.In the modulated pulse signal at this moment, be used for once more additional destination information, so electronic-controlled installation 124 is so that it comprises the control light L after the amplitude modulation shown in the 3rd section portion of the pulse signal ground generation of indicating this destination information, Figure 29 because comprise CBe included in for example light signal L A11In amplitude-modulated pulse light signal P 1Indicated destination information, be wavelength X 1The wavelength bus situation under, wavelength X 1Control light L CGeneration, light signal L A11Shown in following the 2nd section of Figure 29 this sample, be transformed to wavelength X 1From wavelength converting device 118 outputs.In addition, be included in light signal L A11In amplitude-modulated pulse P 1Indicated destination information, be wavelength X 2The wavelength bus situation under, wavelength X 2Control light L CGeneration, light signal L A11Shown in the hypomere portion of Figure 29 this sample, be transformed to wavelength X 2From wavelength converting device 118 outputs.
As above-mentioned this sample, according to present embodiment, amplitude-modulated signal is added to this a series of light signal L as destination information A11In, this light signal L A11The purpose indicated to amplitude-modulated signal transmits.A series of light signal after the amplitude modulation is input under the situation in the wavelength converting device 118 of mutual gain modulation type, corresponding to this light signal L A11The control light L of wavelength of the indicated destination information of amplitude modulation C, a wavelength converting device 118 that supplies to this mutual gain modulation type because output and should control light L CThe output light of identical wavelength, therefore by light distributor 150 for example, will export light to transmission path distribution that should wavelength, carry out route thus, be light signal conveyer or optical signal repeater device 110 so can constitute the route device of high speed and miniaturization.
In addition, according to present embodiment, be added to above-mentioned a series of light signal L A11In amplitude modulation because be to implement, so light signal L smaller or equal to 90% degree of modulation A11Free of losses and destination information are added in the light signal reliably.In addition, above-mentioned a series of light signal L A11Be packet signal, above-mentioned purpose ground information is arranged on the label information or the flag information of the start-up portion of this packet signal, therefore in this label portion LA or sign portion, by amplitude modulation additional label information or flag information.
In addition, according to present embodiment, because comprise (a) input step: make a series of light signal L that has implemented amplitude modulation as destination information A11, to wavelength converting device 118 inputs of mutual gain modulation type; (b) wavelength conversion step: and this light signal L A11Inequality and corresponding to the control light L of the wavelength of amplitude-modulated signal C, supply with to the wavelength converting device 118 of above-mentioned mutual gain modulation type, make this control light L CWavelength light signal, from wavelength converting device 118 output of this mutual gain modulation type; (c) light allocation step: make light signal, be input to the light distributor 150 from wavelength converting device 118 output of above-mentioned mutual gain modulation type, this light signal, according to its wavelength, to a plurality of light transmission paths distribution that are connected to light distributor 150, light signal L A11, with to the wavelength of should amplitude-modulated signal indicated destination information, distribute to a plurality of light transmission paths that are connected to light distributor 150.
In addition, according to present embodiment, above-mentioned wavelength conversion step is because by using control light L CTo the light signal L that is exported from the wavelength converting device 118 of mutual gain modulation type A11Implement amplitude modulation, new destination information is added to this light signal L again A11In, therefore can be added to suitable transmission destination again flashlight relaying (transmissions) and install in 110, so determine the dynamic routing of transmission route to be selected to possibility according to the state of the state of for example link, node, rotorfick state.
In addition, according to the optical signal repeater device 110 of present embodiment, added a series of light signal L of amplitude-modulated signal as destination information A11One transmits, by control light generating apparatus 126, by this a series of light signal L A11Amplitude-modulated signal, send should indicated destination and and this light signal L of amplitude-modulated signal A11The control light L of wavelength inequality C, by the wavelength converting device 118 of mutual gain modulation type, this a series of light signal L A11Be transformed to this control light L CThe light signal of wavelength, by light distributor 150, from the light signal of these mutual gain modulation type wavelength converting device 118 outputs, according to its wavelength, distribute to a plurality of light transmission paths.So, can provide at a high speed and the route device of miniaturization is light signal conveyer or optical signal repeater device 110.
In addition, at present embodiment, because possessed, according to being included in light signal L A11In amplitude-modulated signal, make control light generating apparatus 126 produce control light L to the wavelength of should amplitude-modulated signal indicated destination information CElectronic-controlled installation 124, therefore have the mutual gain modulation type of wavelength conversion function and switching function wavelength converting device 118, can distribute the output of the light signal of the wavelength of corresponding destination information and by light distributor 150, so can obtain at a high speed and the route device of miniaturization be light signal conveyer or optical signal repeater device 110.
In addition, in the present embodiment, (a) the 1st photo-coupler (optical branching filter) 114 is set: be used to make the light signal L that propagates in optical fiber 112 A11Branch, supply with to electronic-controlled installation 124; (b) the photosignal transducer 122: the converting optical signals by the 1st photo-coupler 114 branches is electric signal, supplies with to electronic-controlled installation 124; And (c) light delay element 116: be located in this optical fiber 112, more can the downstream, make the light signal L that is input to wavelength converting device 118 from the 1st optical fiber 112 than the 1st photo-coupler 114 1Postpone; Because above-mentioned electronic-controlled installation 124 extracts and is included in above-mentioned light signal L A11In amplitude-modulated signal, make control light L corresponding to the wavelength of the indicated destination information of this amplitude-modulated signal CTake place from control light generating apparatus 126, therefore have wavelength conversion function and switching function mutual gain modulation type wavelength converting device 118, can export corresponding to the light signal of the wavelength of destination information by 150 distribution of light distributor, so high speed and small-sized route device are that light signal conveyer or optical signal repeater device become possibility.In addition, one side light signal L A11A part supply with electronic-controlled installation 124 from the 1st photo-coupler 114 branches, this light signal L on the other hand A11Another part postpone by light delay element 116 and supply with wavelength converting device 118, therefore can with in electronic-controlled installation 124 be used for electronic signal process and time of postponing irrespectively, make the control light L that supplies with to wavelength converting device 118 from control light generating apparatus 126 C, suitably and the light signal L in this wavelength converting device 118 1Synchronously.
In addition, at present embodiment, mutual gain modulation type wavelength converting device 118 comprises (a) the 1st light amplification element 136 and the 2nd light amplification element 144: utilize the cross-gain modulating characteristic, the light amplification of importing and wavelength conversion are exported; (b) the 3rd photo-coupler (the 1st optical multiplexer) 132: make from the 1st wavelength X of optical fiber 112 inputs 1Flashlight L A11, and as and this flashlight L A11Different wave length λ 2Laser (the 2nd input light) L of continuous light 2Close ripple and be input to the 1st light amplification element 136; (c) the 1st wavelength is selected element 138: from the light from the 1st light amplification element 136, select the 2nd wavelength X 2Light; And (d) the 4th photo-coupler (the 2nd optical multiplexer) 140: make the 2nd wavelength X of selecting element 138 to select by the 1st wavelength 2Light and the 3rd wavelength X 3Control light L CClose ripple and be input to the 2nd light amplification element 144, the 3 wavelength X 3Output light L 3Be and control light L CThe light of identical wavelength is because respond the 1st wavelength X 1Flashlight L 1And/or the 3rd wavelength X 3Control light L CStrength Changes and modulate, when making from having imported flashlight L 1And laser (the 2nd input light) L 2The light of the 1st light amplification element 136 in selected the 2nd wavelength X 2Light and control light L CWhen 144 inputs of the 2nd light amplification element, selected the 3rd wavelength X from the light of the 2nd light amplification element 144 outputs 3Light modulated L 3Perhaps export light L 4, be response signal light L 1And/or control light L CThe light modulated of Strength Changes, become relative control light L CThe signal magnification at least more than or equal to the amplifying signal of 2 size, therefore can adopt control light L CDirectly carry out light signal L 1Processing and amplifying.
In addition, at present embodiment, light distributor 150 possesses the 1st slab guide 150b that is connected to input port 150a; Be connected to the 2nd slab guide 150d of a plurality of output port 150c; Be arranged on the different a plurality of Waveguide array 150e of length between the 1st slab guide 150b and the 2nd slab guide 150d; And the branch optical fiber F that is connected to a plurality of output port 150c B1, F B2, F B3... F Bn, because constitute, the output light L that is input to this input port 150a from wavelength converting device 118 outputs 3(input light), be branch optical fiber F by its wavelength to any of a plurality of output port 150c B1, F B2, F B3... F BnAmong any distribute, so with from the control light L of wavelength converting device 118 outputs CLight modulated L for identical wavelength 3, by its wavelength, to a plurality of branch optical fiber F B1, F B2, F B3... F BnAmong any optionally distribute suitably.
In addition,, owing to possess, have the predefined multi-wavelength's of output the LASER Light Source (control light source) of a plurality of single wavelengths of control light or Wavelength variable LASER Light Source according to the optical signal repeater device 110 of present embodiment, will be according to being included in above-mentioned light signal L 1In the control light L of the selected wavelength of branch information CTo the control light generating apparatus 126 of wavelength converting device 118 supplies, so light signal L 1, to the optical fiber F of a plurality of branch waveguides of correspondence B1, F B2, F B3... F BnAmong, corresponding above-mentioned control light L CWavelength and predefined predetermined optical fiber distributes selectively.
In addition, the control light generating apparatus 126 of present embodiment is because had the switch of being used for from multiple LASER Light Source 126 L1To 126 LnOr Wavelength variable LASER Light Source 126 LVThe photomodulator 126 of the control light of output MSo, from the control light L of the mutual different wave length of control light generating apparatus 126 output CRising and descend suddenly, its response improves.
In addition, at present embodiment, because had, according to being included in the light signal L that is imported from the 1st optical fiber 112 1In branch information, make from control light generating apparatus 126 to have control light L to wavelength that should branch information CElectronic-controlled installation 124, so from the light modulated L of wavelength converting device 118 output 3Wavelength, according to being included in this light signal L A11In destination (branch) information and switch, by this wavelength selectively to a plurality of optical fiber F B1, F B2, F B3... F BnAmong any distribution.
In addition, at present embodiment, electronic-controlled installation 124 only extracts and is included in the light signal L that is imported from optical fiber 112 A11In destination information (address information), by above-mentioned control light generating apparatus 126, make control light L to wavelength that should address signal CTake place, so the electromagnetic wave of the signal beyond the corresponding address signal can not take place by signal Processing, so the light signal of guaranteeing L is arranged 1Concealed advantage.
Other embodiment is described then.Also have, in the following description, to the common part of the above embodiments, additional phase with symbol and omit explanation.
Figure 30 represents above-mentioned Figure 18 and the 1st repeater main part RB shown in Figure 22 11The embodiment of complete optical formation.At Figure 30, be input to the input optical signal L of the 3rd photo-coupler 132 of wavelength converting device 118 A11A part, by photo-coupler (light wave splitting/composing element or optical multiplexer/optical multiplexer) 164 branches, then, by photo-coupler 166 with as the predetermined wavelength of continuous light wavelength X for example 1To λ NThe laser composite wave of continuous light of any wavelength, be input to by possessing in the optical semiconductor amplifier element (SOA) 168 that the cross-gain modulating characteristic is mutual gain modulation characteristic with the 1st light amplification element 136 identical formations shown in Figure 22.Above-mentioned laser L as continuous light for example can adopt Figure 19 or LASER Light Source 126 shown in Figure 20 L1To 126 LnAnd optical multiplexer 126 SAnd variable laser light source 126 shown in Figure 21 LvThe LASER Light Source 170 of identical formation.The relatively slow formation idiocratically of response speed is compared, had to this optical semiconductor amplifier element 168 with above-mentioned the 1st optical semiconductor amplifier element 136 or the 2nd optical semiconductor amplifier element 144.For example, above-mentioned this sample, at the 1st optical semiconductor amplifier element 136 or the 2nd optical semiconductor amplifier element 144, possess under the active layer situation that constitutes by quantum well or quantum dot, above-mentioned optical semiconductor amplifier element 168 possesses this sample of active layer that is made of body (bulk) and constitutes.This optical semiconductor amplifier element 168 is set its gain and/or polarized state by adjusting, and does not respond switch at a high speed.Thus, the input optical signal L shown in the epimere of Figure 31 A11One input is because to should input optical signal L A11The control light signal L of waveform of amplitude-modulated signal C(Figure 31 the 2nd section or the 3rd section), from above-mentioned optical semiconductor amplifier element 168 to the 4th photo-coupler (the 2nd optical multiplexer) 140 inputs, the therefore wavelength X after this sample, the amplitude modulation shown in following the 2nd section of Figure 31 or hypomere 1Or λ NOutput light signal L 3To 150 outputs of light distributor.This output light signal L 3Amplitude-modulated signal, represent for example branch information.At present embodiment, above-mentioned photo-coupler 164, photo-coupler 166, optical semiconductor amplifier element (SOA) 168 and lasing light emitter 170, be configured for exporting add to should wavelength conversion wavelength and the above-mentioned control light L of destination (branch) information CFull optical profile type control device 172.
According to present embodiment, the above-mentioned light signal L that is generated by above-mentioned photo-coupler 164, photo-coupler 166, optical semiconductor amplifier element 168 CAnd the control light L of above-mentioned Figure 18 CIdentical because by amplitude modulation, in real time be included in input optical signal L A11In identical destination information, be added in the initial part of a series of output light, so about such switch work, do not need the above embodiments electronic-controlled installation 124, the full advantage that constitutes is arranged optically.
In addition, at present embodiment, owing to have according to being included in light signal L A11In amplitude-modulated signal, from control light generating apparatus 126, complete optical control device that the control light LC to the wavelength of should amplitude-modulated signal indicated destination information is taken place, by taking place and being included in input optical signal L A11In the control light ground of signal of the indicated destination information correspondence of amplitude-modulated signal control, make the mutual gain modulation type with wavelength conversion function and switching function wavelength converting device 118, can distribute the light signal of the wavelength of corresponding destination information output and by the light distributor, so can obtain at a high speed and the route device of miniaturization be light signal conveyer or optical signal repeater device.Because by optical signal Processing electromagnetic wave does not take place, so the concealed advantage that can guarantee light signal is arranged.
Figure 32 is in order to illustrate, utilizes the technology of the wavelength converting device 118 of above-mentioned Figure 30 to constitute, the optical signal repeater device 180 of full optical profile type, is equivalent to the figure of Figure 17.By optical branching filter S 1In the multiple light of partial wave, with wavelength X 1Input optical signal L A11Be masterpiece explanation, identical with Figure 30, be input to the input optical signal L of the 3rd photo-coupler (the 1st optical multiplexer) 132 of wavelength converting device 118 A11A part, by photo-coupler 164 branches, then, by photo-coupler 166 with as the predetermined wavelength of continuous light wavelength X for example 2To λ NThe laser L of continuous light of any wavelength close ripple, be input to by possessing in the optical semiconductor amplifier element (SOA) 168 that the cross-gain modulating characteristic is mutual gain modulation characteristic with the 1st light amplification element 136 identical formations.In that adopt will be as the laser L of above-mentioned continuous light by optical branching filter S 1The wavelength X of other that partial wave forms 2To λ NAny this point and the embodiment of Figure 30 inequality.Thus, as shown in figure 31, the input optical signal L shown in this epimere A11One input is because corresponding to this input optical signal I A11The light signal L of waveform of amplitude-modulated signal C(Figure 31 the 2nd section or the 3rd section), from above-mentioned optical semiconductor amplifier element 168, to the 4th photo-coupler (the 2nd optical multiplexer) 140 inputs, so wavelength X shown in following the 2nd section of Figure 31 or the hypomere 1Or λ NOutput light signal L 3To 150 outputs of light distributor.According to present embodiment, the advantage that has further full optical profile type to constitute.
Below, further specify other embodiment.
In the above embodiments, other repeater main part RB MNIn, at input optical signal L ANMOptical packet signal, be transformed to presetted wavelength and to predetermined optical fiber F BNMIn the relay process of output, might be from relay process as input optical signal L A11The repeater main part RB of optical packet signal 11, to this predetermined optical fiber F BNM, repeat to export identical wavelength light signal, the overlapping of light signal taken place.In this case, at the embodiment of for example Figure 18, electronic-controlled installation 124 formerly carries out the repeater main part RB of relay process MNConfirm before the terminal of optical packet signal, be added to as input optical signal L detecting by amplitude-modulated signal A11The initial grouping initial part H of optical packet signal in grouping start information situation under, constitute in this optical packet signal by the circuitous information of the additional indication of amplitude modulation.For example, though do not change final purpose ground information, by address in the amplitude modulation change way.According to present embodiment, can avoid the predetermined optical fiber F to the identical traffic path when the basic while of a plurality of optical packet signals BNMWhen delivering letters, mutually conflict.
Figure 33 is the repeater main part RB that is illustrated in other MNIn, input optical signal L ANMOptical packet signal, be transformed to presetted wavelength and to predetermined optical fiber F BNMOutput relay process in, during on repeated reaching input optical signal L herein A11Optical packet signal temporarily store, after the relay process that formerly is transformed to the optical packet signal of above-mentioned predetermined wavelength is finished, can carry out the figure of key component of such relay 110 of its relay process.At Figure 33, have a plurality of light signal memory elements 174: store the optical packet signal that is distributed by above-mentioned smooth distributor 150 for temporary transient, and the many optical fiber that length is different is formed by connecting side by side; Promptly feed back with optical fiber 178 with light feedback transmission path: feed back to input side in order to make from the light signal of this light signal memory element 174 outputs; Photo-coupler 176: be used for the standby wavelength X that handle transmits to input side with optical fiber 178 by feedback 01To λ 03In any optical packet signal, as input optical signal L A11Once more to 114 inputs of the 1st coupling mechanism.Other repeater main part RB MNIn, at input optical signal L ANMOptical packet signal, be transformed to presetted wavelength and to predetermined optical fiber F BNMIn the relay process of output,, be judged to be this repeater main part RB according to the start information among the initial H of grouping portion that is added to optical packet signal by amplitude-modulated signal MNReceive and have to above-mentioned predetermined optical fiber F BNMThe optical packet signal L of the destination information of output A11Situation under, electronic-controlled installation 124 is judged to be: this optical packet signal L A11Should temporarily store.Electronic-controlled installation 124, response is from above-mentioned other repeater main part RB MNThe signal of electronic-controlled installation, make for above-mentioned optical packet signal L A11Be transformed to predefined standby wavelength X 01To λ 03In any control signal L C01To L C03, from the output of control light generating apparatus 126.Use wavelength X from the standby (temporary transient storage) of light distributor 150 outputs 01To λ 03In any light signal, be sent to any of the light signal memory element 174 that is connected to this light distributor 150, in this after schedule time storage, by feedback with optical fiber to photo-coupler 176 transmission, from this as input optical signal L A11To 114 inputs of the 1st coupling mechanism, carry out above-mentioned relay process once more again.Above-mentioned a plurality of light signal memory element 174, for example above-mentioned light delay element 116 is identical, for the length of storage time of being arranged to corresponding stored optical packet signal necessity therein, by many different mutually optical fiber of the length of propagating necessary optics this storage time, reel respectively and constitute respectively.According to present embodiment, can avoid the predetermined optical fiber F to the identical traffic path when the basic while of a plurality of optical packet signals BNMMutual conflict during transmission.
In addition, at the embodiment of above-mentioned Figure 18, electronic-controlled installation 124 is about input optical signal L A11To L A1N, L A21To L A2N... L AM1To L ANM,, make this processing time be with, make the control light L that in wavelength converting device 118, carries out the wavelength conversion processing selectively by mutual difference such as wavelength group or transmission path group for the transmission path transmission of the wavelength of for example expecting to expection CIt is also passable that such formation takes place.
In addition, at above-mentioned wavelength converting device 118, the component parts of the 3rd photo-coupler 132 and the 4th photo-coupler the 140, the 1st light amplification element 136 and the 2nd light amplification element 144 and the 1st wavelength selection element 138 etc., both can link by optical fiber, also can be by combinations such as formed optical waveguides on the light transmission material system substrate of semiconductor substrate or this sample of glass substrate.
In addition, above-mentioned light distributor 150 has the 1st slab guide 150b that is connected to input port 150a; With the 2nd slab guide 150d that is connected to a plurality of output port 150c; And be arranged on the Waveguide array 150e of the different plural number of length between the 1st slab guide 150b and the 2nd slab guide 150d; With the branch optical fiber F that is connected respectively to a plurality of output port 150c B1, F B2, F B3... F Bn, constitute the output light L that is input to this input port 150a from wavelength converting device 118 outputs 3(input light), be branch optical fiber F by its wavelength to any of a plurality of output port 150c B1, F B2, F B3... F BnAmong any distribute, by utilizing by the angle of diffraction of the different diffraction grating of each wavelength as the output light L that imports light 3, many branch optical fiber F arranging to array-like selectively B1, F B2, F B3... F BnThe diffraction grating type light compositing channel-splitting filter that distributes constitutes, and perhaps also can replace this diffraction grating, is made of the synthetic channel-splitting filter of the prismatic light of utilizing prism.In this case, light distributor 150, a plurality of Waveguide arrays of by the refraction angle of the different prism of each wavelength input light being arranged to array-like selectively by utilization distribute, prism-type light distributor constitutes.Optical branching filter S 1To S MOr wave multiplexer T 1To T MAlso be same.
In addition, replace the electronic-controlled installation 124 of the above embodiments, the optical operation device that also can adopt the arithmetic unit that constitutes by a plurality of optical transistors and constitute by LASER Light Source etc.Adopt complete optical device by replacing electronic-controlled installation 124, the integral body of optical signal repeater device 110 is made of optical element.
In addition, in the above embodiments, as optical waveguide, though adopted the 1st optical fiber the 112, the 2nd optical fiber 120 etc., also can adopt in the part that is located at light circuit, in the two-dimensional fundamental form of two-dimensional directional leaded light or at the three-dimensional optical waveguide of three-dimensional leaded light.
In addition, in the above embodiments, in Figure 19, Figure 20, control light generating apparatus 126 shown in Figure 21, can remove photomodulator 126 M1To 126 Mn, 126 MIn this case, in the photomodulator 126 of for example Figure 19, Figure 20, by to LASER Light Source 126 L1To 126 LnOptionally switch drive can make the different control light L of wavelength COutput selectively.In addition, in the photomodulator 126 of Figure 21, by making to variable wavelength LASER Light Source 126 LVThe injection current of DBR layer change step by step, make the different control light L of wavelength COutput selectively.
Figure 34 to Figure 38 represents, can take out the light signal memory storage of light signal with the timing of expection, is applicable to that elevation information handles the example of the photosynthetic ripple/wave splitter device that is used for optical communication of usefulness.
Figure 34 is the figure for the key component formation of explanation light signal memory storage 120.In Figure 34, at the light signal L of transmission from the optical packet signal of optical-fiber network etc., optical data communication signal etc. A Optical fiber 212 in, play the 1st photo-coupler 214, light delay element 216 of optical couplers, WDM, dual-wavelength effect and mutually the wavelength converting device (optical switch device, light signal amplify 3 arrangements of terminal main bodys) 218 etc. of gain modulation type connect successively.
In addition, light delay element 216 makes the light signal that is transmitted in the above-mentioned optical fiber 12, delay scheduled time only, for example constitutes, and is set the travel-time of propagation distance, propagation distance that only delay transit should be predetermined by the optical fiber of coiling predetermined length.The time delay of this light delay element 216, in wavelength converting device 218, experiment is in advance tried to achieve, and makes at the light signal of this amplification and represents the control phototiming of the transmission destination of this light signal with wavelength.
By above-mentioned the 1st photo-coupler 214, the light signal branched optical cable signal of branch in the optical fiber 212, by optical fiber 220 and connected photosignal transducer 222, supply with to electronic-controlled installation 224.Electronic-controlled installation 224 is utilized the temporary transient memory function of RAM and is constituted according to the so-called microcomputer that is stored in the routine processes input signal among the ROM in advance by for example CPU.This electronic-controlled installation 224, according to the coded signal of representing with the amplitude modulation that is included in the light signal that is transmitted by optical fiber 220 is destination information, for this light signal of route, wavelength commands signal that should destination information is supplied with to control light generating apparatus 226.For example, electronic-controlled installation 224 extracts the light signal L that is included in from optical fiber 220 inputs AIn destination information, by control light generating apparatus 226, make with to the corresponding control light L of wavelength that should destination information CTake place.
Above-mentioned control light generating apparatus 226 has the predefined multi-wavelength λ of output CControl light L CThe control light source, be that correspondence is included in light signal L according to command signal from above-mentioned electronic-controlled installation 224 1Branch information and the wavelength commands signal selected, having to wavelength X that should branch information CControl light L C, supply in the above-mentioned wavelength converting device 218.Control light generating apparatus 226 is selected a ground or is made the corresponding output optical fibre F that transmits the destination selectively 1To F NMultiple for example N kind wavelength X 1, λ 2, λ 3... λ NControl light L CTake place.Figure 19 of the above embodiments, Figure 20, Figure 21 represent the configuration example of this control light generating apparatus 226 respectively.Also have, the optical fiber 212 of present embodiment, the 1st photo-coupler 214, light delay element 216, wavelength converting device 218, optical fiber 220, photosignal transducer 222, electronic-controlled installation 224, control light generating apparatus 226, light signal distributor 250, optical fiber 112 with the above embodiments, the 1st photo-coupler 114, light delay element 116, wavelength converting device 118, optical fiber 120, photosignal transducer 122, electronic-controlled installation 124, control light generating apparatus 126, light signal distributor 150 identical formations, wavelength converting device 218 and light signal distributor 250 formations are amplified 3 arrangements of terminals, 128 identical light signals with above-mentioned light signal and are amplified 3 arrangements of terminals 228.
Turn back to Figure 34, from the output light L of above-mentioned wavelength converting device 218 3, promptly control light L by its wavelength CWavelength X 1, λ 2, λ 3... λ N, by light distributor 250, respectively selectively to predefined crosslinking optical fiber F corresponding to a plurality of waveguides 1, F 2, F 3... F NDistribute.In addition, with the bias lighting L different with it 2Identical wavelength X bLight be assigned to branch optical fiber F bFor example, output light L 3For under the monochromatic light situation, to crosslinking optical fiber F 1, F 2, F 3... F NA distribution, but be under 2 kinds of color mixture situations, to crosslinking optical fiber F 1, F 2, F 3... F NAmong any two group distribute.Above-mentioned crosslinking optical fiber F 1And F 2, be connected to and be used to close ripple and handle light signal L ALight add treatment loop 252 and be used for partial wave and handle light signal L ALight subtract treatment loop 254, crosslinking optical fiber F 3To F NBe connected to light buffer-stored element M 3To M NAbove-mentioned smooth buffer-stored element M 3To M N, for example be the roll of optical fiber coiled of predetermined length, make only to postpone time delay in the travel-time in should the optical fiber of predetermined length and output light signal L ADelay element.
From above-mentioned smooth buffer-stored element M 3To M NThe light signal L of output A, the feedback by constituting light feedback transmission path with optical fiber 256 with the 5th photo-coupler (optical multiplexer) 258 of the 1st photo-coupler 214 identical formations, make light signal L AFeed back to than the 1st photo-coupler 214 more by in the optical fiber 212 of upstream side, thus, make it by the 1st photo-coupler 214, light delay element 216, wavelength converting device 218, light distributor 250, buffer fiber storer M 3To M NAny, the circulation road that feedback is constituted with optical fiber the 256, the 5th photo-coupler 258 circulates.
In the light signal memory storage 210 that above-mentioned this sample constitutes, by the light signal L of optical fiber 212 transmission A, extract the destination signal (label) that is included in wherein by electronic-controlled installation 224, in order to distribute, in order to export control light L to wavelength that should the destination signal to the indicated transmission destination of this destination signal C, by electronic-controlled installation 224 control control light generating apparatus 226.Wavelength converting device 218 is at above-mentioned control light L CWavelength be λ 1Situation under, from the output light L of its output 3, be λ because become wavelength 1Light signal L ASo, in light distributor 250, add treatment loop 252 to light and distribute and promptly close ripple or branch.In addition, at above-mentioned control light L CWavelength be λ 2Situation under, from the output light L of wavelength converting device 218 output 3, be λ because become wavelength 2Light signal L ASo, in light distributor 250, subtract treatment loop 254 to light and distribute and promptly close ripple or branch.
But, at above-mentioned light signal L ABe not suitable for directly adding treatment loop 252 or light subtracts under the situation of treatment loop 254 transmission to light, by the electronic processing of electronic-controlled installation 224, this light signal L A, be included in this light signal L receiving outside reading behind the timing signal R or storing into of coming AIn the process of storage time between the back take out.That is, if from the control light L of control light generating apparatus 226 to wavelength converting device 218 outputs CWavelength be λ 3To λ NAny λ for example 3, because from the output light L of wavelength converting device 218 output 3(light signal L A) wavelength be λ 3So, in light distributor 250, to optical cache memory M 3Distribute.This light signal L A, at optical cache memory M 3Behind the middle storage certain hour, using optical fiber the 256, the 5th photo-coupler the 258, the 1st photo-coupler 214, light delay element 216, wavelength converting device 218, light distributor 250, buffer fiber storer M by feedback 3In the circulation road that is constituted, circulate repeatedly and store.Light signal L in this circulation AWhen passing through wavelength converting device 218, from the control light L of control light generating apparatus 226 to wavelength converting device 218 outputs CWavelength be λ 3At such light signal L AStorage in, further with other light signal input and with under the situation of its storage and above-mentioned similarly being transformed to and above-mentioned wavelength X 3Different wave length is λ for example 4, and and above-mentioned same, make its by feedback with optical fiber the 256, the 5th photo-coupler the 258, the 1st photo-coupler 214, light delay element 216, wavelength converting device 218, light distributor 250, buffer fiber storer M 4In the circulation road that is constituted, circulate repeatedly and store.
And, for example be used for to light add taking-up timing signal R that treatment loop 252 takes out, if supply with to electronic-controlled installation 224 by the outside, by electronic-controlled installation 224, by controlling light generating apparatus 226, being used in using optical fiber the 256, the 5th photo-coupler the 258, the 1st photo-coupler 214, light delay element 216, wavelength converting device 218, light distributor 250, buffer fiber storer M by feedback 3Round-robin light signal L repeatedly in the circulation road that is constituted A, in mutual gain modulation type wavelength converting device 218, be transformed to the output wavelength X 1, wavelength X 1Control light L CTake place.Its result is by light distributor 250, light signal L AAdding treatment loop 252 to light distributes, adds treatment loop 252 outputs to this light thus.Electronic-controlled installation 224 also plays the light signal storage control unit of this sample.
As above-mentioned this sample, in the light signal memory storage 210 of present embodiment, play the electronic-controlled installation 224 of light signal storage control unit effect, by control light generating apparatus 226, make for by feedback with optical fiber the 256, the 5th photo-coupler the 258, the 1st photo-coupler 214, light delay element 216, wavelength converting device 218, light distributor 250, buffer fiber storer M 3Round-robin light signal L repeatedly in the circulation road that is constituted A, in mutual gain modulation type wavelength converting device 218, be transformed to the output wavelength X 1Wavelength X 1Control light L CTake place, so, this light signal L A, by the storage of time arbitrarily, and response supply with from the outside or be included in light signal L AIn the indicated period of output of storage signal output information (reading timing signal R) between, can take out light signal L arbitrarily regularly (to take out constantly) A
In addition,, play the electronic-controlled installation 224 of light signal storage control unit effect, because by controlling light generating apparatus 226, being used in a light signal L to mutual gain modulation type wavelength converting device 218 inputs at present embodiment AWavelength, be transformed to storage and use wavelength X 3To λ NIn any, control light L CTake place, so by the light signal L that imports ABe transformed to the storage wavelength X 3To λ NIn any, by repeatedly via mutual gain modulation type wavelength converting device 218, light distributor 250, buffer fiber memory element M 3To M NAny, circulate in the circle transmission path of light feedback transmission path the 256, the 5th photo-coupler the 258, the 1st photo-coupler 214 and light delay element 216, begin this light signal L AStorage.
In addition, at present embodiment, (a) the 1st photo-coupler (optical branching filter) 214 is set: be used to make the light signal L that propagates in optical fiber 212 ABranch, supply with to electronic-controlled installation 224; (b) the photosignal transducer 222: the converting optical signals by the 1st photo-coupler 214 branches is electric signal, supplies with to electronic-controlled installation 224; And (c) light delay element 216: be located in this optical fiber 212, than the 1st photo-coupler 214 more by the downstream, make the light signal L that is input to the wavelength converting device 218 of mutual gain modulation type from the 1st optical fiber 212 APostpone; Because above-mentioned electronic-controlled installation 224 makes and is included in above-mentioned light signal L AIn the control light L of wavelength of destination information correspondence CTake place from control light generating apparatus 226, therefore have wavelength conversion function and switching function mutual gain modulation type wavelength converting device 218, can export corresponding to the light signal of the wavelength of destination information and distribute, so high speed and small-sized route device are that light signal conveyer or optical signal repeater device become possibility by light distributor 250.In addition, one side light signal L AA part supply with electronic-controlled installation 224 from the 1st photo-coupler 214 branches, on the other hand because this light signal L AAnother part postpone by light delay element 216 and supply with wavelength converting device 218, so can with the time delay of in the electronic signal process of electronic-controlled installation 224, using irrespectively, make the control light L that supplies with to wavelength converting device 218 from control light generating apparatus 226 C, suitably and the light signal L in this wavelength converting device 218 ASynchronously.
In addition, at present embodiment, mutual gain modulation type wavelength converting device 218 comprises (a) the 1st light amplification element 236 and the 2nd light amplification element 244: utilize the cross-gain modulating characteristic, the light amplification of importing and wavelength conversion are exported; (b) the 3rd photo-coupler (the 1st optical multiplexer) 232: make from the 1st wavelength X of optical fiber 212 inputs 1Flashlight L A, and as and this flashlight L ADifferent wave length λ bLaser (the 2nd input light, the bias lighting) L of continuous light 2Close ripple and be input to the 1st light amplification element 236; (c) the 1st wavelength is selected element 238: from the light from the 1st light amplification element 236, select the 2nd wavelength X 2Light; (d) the 4th photo-coupler (the 2nd optical multiplexer) 240: make by the 1st wavelength and select element 238 selected the 2nd wavelength X 2Light and the 3rd wavelength X 3Control light L CClose ripple and be input to the 2nd light amplification element 244, the 3 wavelength X 3Output light L 3Be and control light L CThe light of identical wavelength is because respond the 1st wavelength X 1Flashlight L 1And/or the 3rd wavelength X 3Control light L CStrength Changes and modulate, so when making from from having imported flashlight L AAnd laser (the 2nd input light) L 2The light of the 1st light amplification element 236 in, selected the 2nd wavelength X 2Light and control light L CWhen 244 inputs of the 2nd light amplification element, selected the 3rd wavelength X from light from the 2nd light amplification element 244 3Light modulated L 3Perhaps export light L 4, be response signal light L 1And/or control light L CThe light modulated of Strength Changes, become relative control light L CThe signal magnification at least more than or equal to the amplifying signal of 2 sizes, so can adopt control light L CDirectly carry out light signal L 1Processing and amplifying.
Below, other embodiment of light signal memory storage 210 is described.
Above-mentioned electronic-controlled installation 224, for suppress, by repeatedly via with mutual gain modulation type wavelength converting device 218, light distributor 250, buffer fiber storer M 3To M NAny, circulation and the light signal L of storage in the circle transmission path of light feedback transmission path the 256, the 5th photo-coupler the 258, the 1st photo-coupler 214 and light delay element 216 CThe increase and decrease of gain, also can further possess this round-robin light signal of control L APerhaps supply to the control light L of mutual gain modulation type wavelength converting device 218 CThe optical signal gain control module.That is, electronic-controlled installation 224 is according to the control of program stored control in advance light L C, make round-robin light signal L by 222 inputs of the 1st photo-coupler 214 and photosignal transducer AGain certain.Flashlight L for example AGain one reduce, increase control light L CGain, make in the mutual gain modulation type wavelength converting device 218, this flashlight L AAmplify flashlight L AGain one increase, reduce to control light L CGain, make in the mutual gain modulation type wavelength converting device 218, this flashlight L AReduce.
Figure 35 further represents the light signal memory storage 270 of other embodiment.The light signal memory storage 270 of present embodiment is with respect to the light signal memory storage 210 of the above embodiments, in order to suppress to follow round-robin light signal L AThe increase of for example vibrating of the Strength Changes of storage time (period) or the feedback light multiplying arrangement 272 of decay between feedback with this point among the optical fiber 256, among electronic-controlled installation 224 above-mentioned functions, be not provided with, in order to make the light signal L that stores by circulation CGain certain and control supplies to the control light L of mutual gain modulation type wavelength converting device 218 CThe optical signal gain control function, this point difference, other constitutes in the same manner.In addition, at present embodiment, the 1st gain control with light amplifier element 276 and the 2nd gain control with response time (response characteristic) of light amplifier element 280, be set at than the 1st light amplification element 236 and the 2nd light amplification element 244 long (slowly).For example, the 1st gain control with light amplifier element 276 and/or the 2nd gain control with light amplifier element 280, rare earth element by for example er element etc. is doped in optical fiber or the optical waveguide, in this light transmission medium, the light amplification element that constitutes of the energy energy level of 3 energy levels systems or 4 energy levels system etc., the light amplification element slow by the response time of mutual gain modulation constitutes.Owing to constitute by slow light amplification element of response time, so round-robin light signal L AThe signal content smoothing and detect the variation of its signal gain easily.
Above-mentioned feedback light multiplying arrangement 272, corresponding optical signal gain control module, according to be included in from the bias lighting L in the output light of the 2nd light amplification element 244 of wavelength converting device 218 2Identical wavelength X bLight add benefit minimizing, make by the light signal L of feedback with optical fiber 256 feedback AAmplify.That is, feedback light multiplying arrangement 272 is provided with, LASER Light Source 274: output wavelength λ pCertain laser; The 1st gain control is with light amplifier element 276: receive with by optical fiber F bBias lighting L from above-mentioned smooth distributor 250 outputs 2Identical wavelength X bLight and above-mentioned wavelength X pLaser, output along with this bias lighting L 2Identical wavelength X bThe increase of gain of light and the wavelength X that gains and reduce pGain control light L 5Wave filter 278: make the 1st gain control with the wavelength X in the output light of light amplifier element 276 pLight pass through; The 2nd gain control light amplifier element 280: receive by this filter wavelength λ pLight and light signal fed back L A, output along with this gain control light L 5Minimizing and the light signal L that gains and increase AWith wave filter 282: make in the output light of the 2nd gain control with light amplifier element 280, wavelength X 3To λ NThe light signal L of any wavelength ABy and only do not make wavelength L 3Light pass through.By above-mentioned the 2nd gain control with light amplifier element 280, corresponding to round-robin light signal L AThe increase and decrease of gain opposite, with bias lighting L 2Identical wavelength X bLight gain increase and decrease, make light signal fed back L AGain increase and decrease, this light signal L thus AThe increase or the reduction of each round-robin gain be suppressed, and keep certain substantially gain.According to present embodiment, add to obtain the effect identical, though, suppressed the variation of the decay of delay, so suppressed to be storage round-robin light signal L also because quick response signal is a former state still with the above embodiments AThe increase or the reduction of gain, also have the advantage of keeping certain substantially gain.
Figure 36 is the sequential chart of the work of the above-mentioned light signal memory storage 270 of explanation.At light signal L ABe to answer under the storage signal situation, this light signal L of input A, in wavelength converting device 218 according to control light L C(λ 3), be transformed to storage with wavelength λ for example 3, and be assigned to optical cache memory M by light distributor 250 3Afterwards, light signal L AAlong by optical cache memory M 3, feedback with optical fiber 256, feedback light multiplying arrangement 272, feed back with optical fiber the 256, the 5th photo-coupler 258, wavelength converting device 218, circulation road that light distributor 250 constituted and circulate.At this moment, because by feedback light multiplying arrangement 272, round-robin light signal L AThe decay of gain be suppressed and keep certain, so if become the light signal L that the epimere of Figure 36 is imported A, round-robin light signal L then AJust become the state shown in this hypomere.Taking out the light signal L that stores by this circulation ASituation under, if with arbitrarily regularly, by arbitrarily interval, in wavelength converting device 218 according to control light L C(λ 1), it is transformed to output with wavelength λ for example 1, by adding treatment loop 252 outputs to light by light distributor 250.Waveform is represented this light signal L shown in following the 3rd section of Figure 36 AOutput waveform.In addition, following the 2nd segment table of Figure 36 shows remaining other the output waveform by above-mentioned output.
In passing, Figure 37 represents, above-mentioned feedback light multiplying arrangement 272 is not set, and does not suppress round-robin light signal L AThe attenuation of gain under signal waveform.For example, under the situation that feedback light multiplying arrangement 272 is not set in above-mentioned light signal memory storage 270 or signal waveform under the situation of light signal memory storage 210 under the optical signal gain control module situation, Figure 34 is not set in electronic-controlled installation 224.The epimere of this Figure 37 and hypomere, the epimere of corresponding Figure 36 with and under section.
Figure 38 represents other the light signal memory storage 290 of embodiment of the present invention.The light signal memory storage 290 of present embodiment, light signal memory storage 210 with respect to the above embodiments, omit light delay element 216 and the 1st photo-coupler 214 these points, complete optical operation control device 292 these points that replace electronic-controlled installation 224 are set, are provided with and are used to make and use optical fiber 256 and the light signal L of feedback by feedback AA part of branch and be input to identical photo-coupler 294 these points of the 1st photo-coupler 214 of complete optical operation control device 292, the operation control device 292 of this full optics, based on following round-robin light signal L AStorage time (period) decay, as the optical signal gain control module that suppresses this decay this point that works, these points are different, other identical formation.
The operation control device 292 of above-mentioned full optics for example, possesses N group photocontrol loop, and this group photocontrol loop is by output wavelength λ 3The LASER Light Source of continuous light, this wavelength X 3Laser and from the photo-coupler that timing signal R closes ripple of reading of outside, and and receive by the light of ripple that this photo-coupler closes, by reading the interval output wavelength λ of reading of timing signal R 3Control light L CThe identical wavelength converting devices of above-mentioned mutual gain modulation type wavelength converting device 18 constitute, therefore, response is read timing signal R with what regularly supply with arbitrarily, takes out the light signal L that is stored by circulation AIn addition, the operation control device 292 of above-mentioned full optics, the light signal LA of reception from the circulation that above-mentioned photo-coupler 294 is supplied with is set, forms the light delay element of low-response of envelope of the decay of this gain of expression, constitute, the wavelength X that expression is exported from this light delay element 3Die-away curve light, as control light L cSupply to the wavelength converting device 218 of above-mentioned mutual gain modulation type.Thus, suppressed the wavelength X exported from the wavelength converting device 218 of mutual gain modulation type 3Light signal L AThe decay that causes because of circulation.According to present embodiment, can obtain the effect identical with the embodiment of above-mentioned Figure 35.
In addition, above-mentioned light distributor 250 also can be to interfere membranous type light distributor.The multilayer wave filter that is categorized as inteferometer coating is by SiO 2Film and TiO 2The mutual tens layers lamination of film form, reflection certain wavelengths ground constitutes.
In addition, replace the electronic-controlled installation 224 of the above embodiments, the optical operation control device that also can adopt the arithmetic unit that constitutes by a plurality of optical transistor and constitute by LASER Light Source etc.By the complete optical device that adopt to replace electronic-controlled installation 224, all the constituting of light signal memory storage 210 by optical element.
In addition, in the light signal memory storage 210 of the above embodiments, light adds treatment loop 252, and light subtracts treatment loop 254, optical cache memory M 3To M NQuantity can carry out all changes, can remove or append a part wherein.
In addition, in the wavelength converting device 218 of for example mutual gain modulation type, control light L CWavelength X CAlso can with flashlight L AWavelength X 1Identical.In the case, from the output light L of the wavelength converting device 18 of mutual gain modulation type 3Wavelength and flashlight L AWavelength X 1Identical.
Also have, above-mentioned only is one embodiment of the invention, and the present invention can increase many variations in the scope that does not break away from its purport.

Claims (34)

1. a light signal amplifies 3 arrangements of terminals, it is characterized in that, possess: have the active layer that is constituted by pn knot respectively, be used for that light signal to input amplifies and wavelength conversion and the 1st optical semiconductor amplifier element and the 2nd optical semiconductor amplifier element exported; The 2nd input light that makes the 1st of the 1st wavelength import light and the 2nd wavelength is input to the 1st light input element of above-mentioned the 1st optical semiconductor amplifier element; From selecting element from the 1st wavelength of the light of selecting above-mentioned the 2nd wavelength the light of above-mentioned the 1st optical semiconductor amplifier element; Making by the 1st wavelength selects the 3rd input light of the light of selected the 2nd wavelength of element and the 3rd wavelength to be input to the 2nd light input element of above-mentioned the 2nd optical semiconductor amplifier element; And from selecting element from the 2nd wavelength of the output light of selecting the 3rd wavelength the light of the 2nd optical semiconductor amplifier element; The 3rd input light intensity of the 1st input light and/or the 3rd wavelength of above-mentioned the 1st wavelength of output photoresponse of above-mentioned the 3rd wavelength change and the signal magnification of the 3rd input light of modulation and above-mentioned relatively the 3rd wavelength more than or equal to 2 times.
2. light signal as claimed in claim 1 amplifies 3 arrangements of terminals, wherein, the 1st of above-mentioned the 1st wavelength is imported only light modulated, the 2nd of above-mentioned the 2nd wavelength is imported only continuous light, light is only controlled in the 3rd input of above-mentioned the 3rd wavelength, and the output light of above-mentioned the 3rd wavelength possesses the signal waveform after the modulation signal of input interval the 1st input light of this control light is exaggerated.
3. light signal as claimed in claim 1 or 2 amplifies 3 arrangements of terminals, and wherein, above-mentioned the 3rd wavelength is and the identical wavelength of above-mentioned the 1st wavelength.
4. amplify 3 arrangements of terminals as any one described light signal in the claim 1 to 3, wherein, the signal magnification of the control light of above-mentioned relatively the 3rd wavelength of output light of above-mentioned the 3rd wavelength is more than or equal to 10 times.
5. amplify 3 arrangements of terminals as any one described light signal in the claim 1 to 4, wherein, the active layer of above-mentioned optical semiconductor amplifier element is made of quantum well, the super crystal of strain or quantum dot.
6. amplify 3 arrangements of terminals as any one described light signal in the claim 1 to 5, wherein, be provided with and be used for the reflector element of the light of the active layer that has passed through above-mentioned optical semiconductor amplifier element to the reflection of this optical semiconductor amplifier element or other optical semiconductor amplifier element.
7. amplify 3 arrangements of terminals as any one described light signal in the claim 1 to 6, wherein, above-mentioned the 1st optical semiconductor amplifier element and/or the 2nd optical semiconductor amplifier element, possess in the one end side and to be used for catoptrical selectively reflector element, the optical combination of end face of these reflector element scioptics and the 1st optical semiconductor amplifier element and/or the 2nd optical semiconductor amplifier element.
8. amplify 3 arrangements of terminals as claim 6 or 7 described light signals, wherein, above-mentioned reflector element is: do not reflect the 1st input light from above-mentioned the 1st wavelength in the light of above-mentioned the 1st optical semiconductor amplifier element, and the 1st wavelength selectivity mirror that light that will above-mentioned the 2nd wavelength reflects to the 2nd optical semiconductor amplifier element; Do not reflect from the 2nd input light of above-mentioned the 1st wavelength in the light of the 2nd optical semiconductor amplifier element and reflect the 2nd wavelength selectivity mirror of the light of above-mentioned the 3rd wavelength.
9. amplify 3 arrangements of terminals as claim 6 or 7 described light signals, wherein, at an end face of above-mentioned the 1st optical semiconductor amplifier element be used between the catoptrical reflector element, be provided with the transmittance that does not make above-mentioned the 1st wavelength and the light transmissive wavelength selectivity wave filter that makes above-mentioned the 2nd wavelength; At an end face of above-mentioned the 2nd optical semiconductor amplifier element be used between the catoptrical reflector element, be arranged on the transmittance that does not make above-mentioned the 2nd wavelength and the wavelength selectivity wave filter that makes the transmission of above-mentioned control light wavelength.
10. amplify 3 arrangements of terminals as any one described light signal in the claim 6 to 9, wherein, above-mentioned reflector element selects element and/or the 2nd wavelength to select elements act as above-mentioned the 1st wavelength,, make from the output light of predetermined optical semiconductor amplifier element and import the incident angle of the input light of this reflector element and/or the ejaculation angle of output light by change to other optical semiconductor amplifier element.
11. amplify 3 arrangements of terminals as any one described light signal in the claim 1 to 6,8,9,10, wherein, on semiconductor substrate in the formed optical waveguide, many above-mentioned the 1st optical semiconductor amplifier elements of group and the 2nd optical semiconductor amplifier element are set respectively, and these many groups are as the integrated formation of 1 chip.
12. amplify 3 arrangements of terminals as any one described light signal in the claim 1 to 9, wherein, be provided with light circulator or directivity binding member: its end face by above-mentioned optical semiconductor amplifier element is input in the above-mentioned optical semiconductor amplifier element input light, by this end face the photoconduction of in this optical semiconductor amplifier element, exporting to the light path that is different from this input light.
13. amplify 3 arrangements of terminals as any one described light signal in the claim 1 to 12, wherein, select element or the 2nd wavelength to select the wavelength selectivity mirror or the wavelength selectivity wave filter of elements act as above-mentioned the 1st wavelength, by being located in the light path, any in the grating filter of optical propagation direction refractive index cycle variation, different many groups layer laminate forms by refractive index multi layer film filter and photonic crystal with photon band gap constitutes.
14. amplify 3 arrangements of terminals as any one described light signal in the claim 1 to 13, wherein, above-mentioned light signal amplifies 3 arrangements of terminals and constitutes light Sheffer stroke gate, light rejection gate, light trigger loop or optical operation amplifier.
15. amplify 3 arrangements of terminals as any one described light signal in the claim 1 to 14, wherein, above-mentioned the 2nd wavelength selection element is the light distributor: it is selected the output light of 3rd wavelength corresponding with the above-mentioned control light wavelength the light of being exported from above-mentioned the 2nd optical semiconductor amplifier element and distributes to a plurality of light transmission paths according to the output light wavelength of the 3rd wavelength.
16. light signal transfer approach, a series of light signals that transmission path transmitted that its warp is predetermined, transmitting in a plurality of transmission paths corresponding to the transmission path that is included in the destination information in this light signal, it is characterized in that, comprise input step: a series of light signal that makes additional above-mentioned purpose is arranged information is to the big 3 arrangements of terminal main bodys input of above-mentioned optical signal amplifying; Wavelength conversion step: the control light corresponding to the wavelength of the signal of expression above-mentioned purpose ground information is supplied with to the big 3 arrangements of terminal main bodys of above-mentioned optical signal amplifying, made the light signal of this control light wavelength amplify 3 arrangements of terminal main bodys and export from this light signal; And light allocation step: make and amplify the light signal that 3 arrangements of terminal main bodys are exported from above-mentioned light signal and be input to the light distributor, this light signal is distributed to a plurality of light transmission paths that are connected to this light distributor according to its wavelength.
17. light signal transfer approach as claimed in claim 16, wherein, above-mentioned wavelength conversion step, by the light signal enforcement amplitude modulation of adopting above-mentioned control light to be exported amplify 3 arrangements of terminal main bodys from above-mentioned light signal, additional new again destination information is in this light signal.
18. as claim 16 or 17 described light signal transfer approachs, wherein, above-mentioned a series of light signal is with smaller or equal to 90% degree of modulation amplitude modulation.
19. optical signal repeater device, be used between optical signal transmission network, implemented the transmitting from side's network toward the transmission path of the opposing party's network of a series of light signal after the amplitude modulation as destination information corresponding to the transmission path that is included in the destination information in this light signal, it is characterized in that, comprise, the control light generating apparatus: by the amplitude-modulated signal of above-mentioned a series of light signal, the control light of the wavelength of the destination that to make this amplitude-modulated signal corresponding indicated takes place; Light signal amplifies 3 arrangements of terminal main bodys: the above-mentioned a series of converting optical signals light signal that is above-mentioned control light wavelength; And light distributor:, distribute to a plurality of light transmission paths according to its wavelength amplify the light signal that 3 arrangements of terminal main bodys are exported from this light signal.
20. optical signal repeater device as claimed in claim 19, wherein, possess electronic-controlled installation or complete optical control device: it is according to the amplitude-modulated signal that is included in the above-mentioned light signal, from above-mentioned control light generating apparatus the control light corresponding to the wavelength of the indicated destination information of this amplitude-modulated signal is taken place.
21. optical signal repeater device as claimed in claim 20 wherein, possesses, and makes the optical branching filter of a part of branch of above-mentioned light signal; Is the converting optical signals by this branch of optical branching filter institute the photosignal transducer that electric signal is supplied with to above-mentioned electronic-controlled installation; And be located at more to make by this optical branching filter input optical signal and amplify the light delay element that the light signal of 3 arrangements of terminal main bodys postpones by the downstream than above-mentioned optical branching filter, above-mentioned electronic-controlled installation, extraction is included in the amplitude-modulated signal in the above-mentioned light signal, and the control light corresponding to the wavelength of the indicated destination information of this amplitude-modulated signal is taken place from above-mentioned control light generating apparatus.
22., wherein, possess the light signal memory element that is used for temporarily storing by the light signal that above-mentioned smooth distributor distributed as claim 20 or 21 described optical signal repeater devices; With the light feedback transmission path that is used to make the light signal exported from this light signal memory element to the input side feedback, above-mentioned electronic-controlled installation, be that output is used to make this optical packet signal to be transformed to the control light signal of predefined storage with wavelength under the situation of the optical packet signal that should temporarily store at above-mentioned light signal; Above-mentioned smooth distributor distributes and it is temporarily stored at this place to above-mentioned light signal memory element being transformed to the optical packet signal of this storage after with wavelength.
23. optical signal repeater device as claimed in claim 22, wherein, above-mentioned light signal memory element disposes the different multifiber of optical spread length side by side in order to receive the light signal that is distributed by the light distributor; Above-mentioned electronic-controlled installation, according to the storage time of the above-mentioned optical packet signal necessity that should temporarily store, output is used to make this optical packet signal to be transformed to the control light signal of predefined storage with wavelength; Above-mentioned smooth distributor distributes and makes it temporarily to store at this place to any of the multifiber of above-mentioned light signal memory element being transformed to the optical packet signal of this storage after with wavelength.
24. optical signal repeater device as claimed in claim 20, wherein, above-mentioned complete optical control device comprises: the photo-coupler that makes a part of branch of above-mentioned the 1st input light; Continuous light source with the continuous light of the identical wavelength of above-mentioned control light takes place; From the continuous light of this continuous light source with close the photo-coupler of ripple from the part of above-mentioned the 1st input light of this photo-coupler; And receiving light from this photo-coupler, output has the control light that is included in the modulation signal in the 1st input light, the optical semiconductor amplifier element that response speed is slower than above-mentioned optical semiconductor amplifier element.
25. as any one described optical signal repeater device in the claim 19 to 24, wherein, one input is amplified the output light that 3 arrangements of terminal main bodys are exported from above-mentioned light signal, and above-mentioned smooth distributor is just the light transmission path distribution corresponding to above-mentioned control light wavelength among above-mentioned a plurality of light transmission paths selectively of the output light of this input.
26. as any one described optical signal repeater device in the claim 19 to 25, wherein, above-mentioned smooth distributor possesses: be connected to the 1st slab guide of input port; Be connected to the 2nd slab guide of a plurality of output ports; And be arranged on different a plurality of Waveguide arrays of length between these the 1st slab guides and the 2nd slab guide, be the arrayed waveguide grating type channel-splitting filter that the input light that is input to this input port is distributed to above-mentioned a plurality of output ports by its each wavelength.
27. light signal memory storage, its storage is from the input light signal imported of light transmission path and can be in that the time is taken out it arbitrarily, it is characterized in that possessing: the control light generating apparatus: be used for the converting optical signals of importing from above-mentioned input light transmission path is the control light corresponding to the transmission destination that is included in this input signal and identical or different with above-mentioned light signal wavelength; Light signal amplifies 3 arrangements of terminal main bodys: receive the light signal and the control light of above-mentioned input, exporting behind the light signal of the converting optical signals of this input for this control light wavelength; Light distributor: the Wavelength Assignment of the light signal that amplifies the output of 3 arrangements of terminal main bodys from this light signal according to this light signal; Light buffer-stored element: temporarily storing with the light signal of wavelength by the storage that this light distributor distributed; Light feedback transmission path: amplify the input of 3 arrangements of terminal main bodys to light signal once more in order to make the light signal of being exported from this light buffer-stored element, and this light signal is fed back to above-mentioned input light transmission path; And light signal storage control unit: make from above-mentioned control light generating apparatus be used for amplify at above-mentioned light signal 3 arrangements of terminal main bodys, light distributor, light buffer-stored element and this light feedback transmission path repeatedly the round-robin light signal amplify at this light signal and be transformed to output in the 3 arrangements of terminal main bodys with the control light of wavelength.
28. light signal memory storage as claimed in claim 27, wherein, be the increase and decrease of the gain that suppresses above-mentioned round-robin light signal, further comprise the light signal that control is fed back by above-mentioned smooth feedback transmission path or supply to the optical signal gain control module that above-mentioned light signal amplifies the control light of 3 arrangements of terminal main bodys.
29. light signal memory storage as claimed in claim 28, wherein, above-mentioned light signal amplifies 3 arrangements of terminal main bodys to be possessed: make above-mentioned converting optical signals for anti-phase the 1st optical semiconductor amplifier element of biasing light wavelength with to make by the anti-phase converting optical signals of the 1st optical semiconductor amplifier element be the 2nd anti-phase optical semiconductor amplifier element of above-mentioned control light wavelength; Above-mentioned optical signal gain control module is controlled the light signal that is fed back by light feedback transmission path according to the increase and decrease of the gain that comprises to come the bias lighting in the output light of above-mentioned the 2nd optical semiconductor amplifier element.
30. as claim 28 or 29 described light signal memory storages, wherein, above-mentioned optical signal gain control module comprises: the 1st gain control light amplifier element: its receive above-mentioned bias lighting and as with the gain control light of the continuous light of this bias lighting different wave length, output is followed the increase of gain of this bias lighting and the gain control light that gains and reduce; With the 2nd gain control light amplifier element: it receives from the 1st gain control with the output light of light amplifier element and the light signal that is fed back by above-mentioned smooth feedback transmission path, and output is followed the minimizing of this gain control light and the light signal of the increase that gains.
31. light signal memory storage as claimed in claim 30, wherein, above-mentioned the 1st gain control is made of optical fiber amplifier element that is added with rare earth element or optical waveguide amplifier element with the light amplifier element with light amplifier element and/or the 2nd gain control.
32. light signal memory storage as claimed in claim 28, wherein, above-mentioned optical signal gain control module comprises, for the gain with above-mentioned round-robin light signal is maintained necessarily, according to the increase and decrease by the gain of the light signal of above-mentioned smooth feedback transmission path feedback, control supplies to the optics ntg operation control device of gain that above-mentioned light signal amplifies the control light of 3 arrangements of terminal main bodys.
33., wherein, possess the electronic-controlled installation that is used to control above-mentioned control light generating apparatus as any one described light signal memory storage in the claim 27 to 30; Is the converting optical signals by branch of above-mentioned optical branching filter institute the photosignal transducer that electric signal is supplied with to above-mentioned electronic-controlled installation; And be arranged on than this optical branching filter more by the downstream, make by this optical branching filter and import the light delay element that light signal that above-mentioned light signal amplifies 3 arrangements of terminal main bodys postpones, above-mentioned electronic-controlled installation, response is supplied with or is included between the indicated period of output of storage signal output information the above-mentioned light signal from the outside, is used in the control light of above-mentioned converting optical signals for output usefulness wavelength is taken place by above-mentioned control light generating apparatus.
34. as any one described light signal memory storage in the claim 27 to 32, wherein, possess complete optical operation control device: that its response is supplied with from the outside or be included between the indicated period of output of storage signal output information the above-mentioned light signal, be used in and above-mentioned converting optical signals is used the control light of wavelength for output take place by above-mentioned control light generating apparatus.
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CN109564362A (en) * 2016-11-23 2019-04-02 洛克利光子有限公司 Electrooptical device
CN109564362B (en) * 2016-11-23 2023-12-12 洛克利光子有限公司 Optoelectronic device

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