CN1467934A - Bi-directional wavelength optical function module - Google Patents
Bi-directional wavelength optical function module Download PDFInfo
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- CN1467934A CN1467934A CNA021360103A CN02136010A CN1467934A CN 1467934 A CN1467934 A CN 1467934A CN A021360103 A CNA021360103 A CN A021360103A CN 02136010 A CN02136010 A CN 02136010A CN 1467934 A CN1467934 A CN 1467934A
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Abstract
The invention relates to a bidirectional wavelength optical functional module having multiple task optical communication systems, which comprises at least a wavelength management module containing a plurality of port ends, and coupled between a first optical transceiver and a second optical transceiver, which provide a first and a second optical channel respectively and can be used to transmit a plurality of optical signal of wavelengths, and at least a unidirectional optical functional module possessing the optical isolation function which is coupled between some of the port ends of the wavelength management module. The beneficial effects of the invention are easy expansion of the channel number, low plug-in loss and high optical insulation property.
Description
Technical field:
The present invention relates to a kind of optical communication system technology, especially relate to a kind of bi-directional wavelength optical function module with multitask optical communication system.
Background technology:
In the communication transmission of sound and image or the application of other high speed data transfer, using the optical system of high-transmission efficient is the technology that is carried out employing at present.This is because optical communication system has the reason of very wide frequency range to the transmission of information signal channel.Though optical communication system has the characteristic of wideband, yet at present in many systems that both deposited, the optical fiber that each bar is used for transmitting the information signal only is used for one-way transmission (one direction communication).Some present optical communication systems that below will underdraw, and its shortcoming is discussed.Fig. 1 is a kind of known pair of fiber transmission device 10, in order to transmit to receive several different wave lengths (λ 1, and λ 2 ..., λ n) the light signal.Wherein the first optical transceiver 12a has transmitting terminal TX1 and receiving terminal RX1, and the second optical transceiver 12b has transmitting terminal TX2 and receiving terminal RX2.(λ 1 for several different wave lengths, λ 2, ..., λ n) after light signal is sent by the transmitting terminal TX1 of the first optical transceiver 12a, via optical fiber 14a transmission and by several erbium-doped fiber amplifiers (erbium-doped fiberamplifier, EDFA) 16 with after the signal amplification, just received by the receiving terminal RX2 of the second optical transceiver 12b.Otherwise (λ 1, and λ 2 for several different wave lengths, ..., λ n) after light signal can be sent by the transmitting terminal TX2 of the second optical transceiver 12b, after transmitting and signal is amplified via optical fiber 14b, just received by the receiving terminal RX1 of the first optical transceiver 12a by EDFA amplifier 16.Each bar optical fiber 14a, 14b of this kind framework only can do one-way transmission, and the last usefulness of several EDFA amplifiers 16 as amplifier on the line (line-amplifier) of must connecting of each bar optical fiber 14a, 14b.Fig. 2 is known a kind of two-way amplifier module (US Pat.No.5,452,124), and it only needs an EDFA amplifier 24 promptly can utilize single optical fiber to make the purpose of transmitted in both directions.Simultaneously, this kind framework more utilizes the partial wave multiplexer (wavelength-division multiplexer WDM) reaches the purpose of transmitted in both directions.As shown in Figure 2, the light signal spreads out of via optical fiber 26 transmission from the transmitting terminal TX1 of optical transceiver 21a, and the output optical fibre 26 via partial wave multiplexer 23a, partial wave multiplexer 22c reaches partial wave multiplexer 23b more afterwards.Partial wave multiplexer 23b is at the light signal that can receive from optical fiber 26 or 28, and exports it to EDFA amplifier 24 the light signal is amplified.Signal after the amplification, decomposite the light signal that the transmitting terminal TX1 of optical transceiver 21a spreads out of by partial wave multiplexer 22b again, be sent to partial wave multiplexer 23c via optical fiber 26 more afterwards, and decompose the receiving terminal RX2 that is sent to optical transceiver 21b via partial wave multiplexer 22a.Otherwise the transmitting terminal TX2 of optical receiver 21b can be sent to the receiving terminal RX1 of optical transceiver 21a in an identical manner via fiber path 28.Fig. 3 then is Bake (Baker ' s) light communication system of another kind of known use single optical fiber two-way amplifier module 34, and it utilizes the partial wave multitask filter (four-port WDMfilter) at one four port and single EDFA amplifier to finish.Fig. 4 has then provided the partial wave multitask Filter Structures at four ports.Amplification module 34 in this structure is that it has four port end P1～P4, and an EDFA amplifier 36 constitutes by one four port partial wave multitask filter 35.As shown in Figure 3, the light signal of the wavelength X 1 that is spread out of by the ejecting end TX (λ 1) of optical transceiver 32a inputs to amplification module 34 via optical fiber 37 by the port end P1 of four port partial wave multitask filters 35, and by sending EDFA amplifier 36 to after the port end P3 output light signal is amplified.Afterwards, input to the port end P4 of four port partial wave multitask filters 35 again by port end P4, and again by port end P2 output, be sent to the receiving terminal RX2 (λ 1) of the light signal of the partial wave multitask filter 32b output wavelength λ 1 to the optical transceiver 30b via optical fiber 37.Otherwise in like manner, after the ejecting end TX of optical transceiver 30b (λ 2) emission, via exporting EDFA amplifier 36 to behind port end P2, the P3, input to port end P4 afterwards again, and export to the receiving terminal RX (λ 2) of optical transceiver 30a by P1.Four above-mentioned port partial wave multitask filters 35, it as shown in Figure 4, constituted by multilayer dielectric substrate (multilayer dielectric substrate) 35a and lens (lens) 35b, and had four port end (port) P1～P4 as light signal output input usefulness.Substrate 35a is designed to only allow wavelength X 2 pass through, and reflects the light signal of other wavelength, and as being sent to optical transceiver 30a end by optical transceiver 30b end, reverse and different wave length then can't transmit.Therefore, when the light signal of wavelength X 1 inputs to four port partial wave multitask filters 35 by port end P1, just be reflected onto port end P2 output.After amplifying through EDFA amplifier 36, the light signal of wavelength X 1 and λ 2 leaves EDFA amplifier 36, and is sent to port end P4.In this, be focused on the right side of lens 35b (to be illustrated as benchmark).The light signal of wavelength X 1 just is reflected, and via lens 35b, and is left by port end P2, and is sent to the second optical transceiver 32b.Otherwise the light signal of wavelength X 2 passes the substrate of lens 35b and is focused to port end P1 by the left side of lens 35b, and is sent to the first optical transceiver 32a.Yet above-mentioned framework can have the shortcoming of low isolated property (low isolation) in the light reflection, and the situation that multi-wavelength is used is had big insertion loss (insertion loss).Fig. 5 then provides the framework (U.S.Pat.No.5,633,741) of another kind of known bi-directional light amplification module, and it utilizes two light circulators (opticalcirculator) 50a, 50b to carry out the transmission and the reception of light signal.This kind framework can be handled the light signal of four channel f1～f4, but needs two image intensifer 52a, 52b to finish.Therefore, when needs are handled the situation of multi-wavelength application, can make system too huge.Fig. 6 also is the structure (U.S.Pat.No.5,748,363) of known a kind of two-way amplifier.This two-way amplifier structure comprises amplification module 62, and it has two input optical fibre 64a, 64b, and can receive wavelength respectively is that λ 1, λ 2 are the light signal of λ 3, λ 4 with wavelength.The end of input optical fibre 64a, 64b is then received one or four port light circulator 62a, 62b respectively.EDFA amplifier 62c then is coupled to the port end P4 of four port light circulator 62a and the port end P1 of four port light circulator 62b, and this EDFA amplifier 62c is for light signal one-way transmission.Framework by this cooperates four port light circulator 62a, 62b and unidirectional EDFA amplifier 62c just can handle the light signal transmitted in both directions of four different wave lengths.Yet this kind framework can be had any problem when extending to the multi-wavelength application.In sum, each bar optical fiber of known light amplification module structure only can be done one-way transmission, and must the next usefulness as amplifier on the line (line-amplifier) of several EDFA amplifiers of series connection on each bar optical fiber.In addition, known bi-directional light amplification module structure can have the shortcoming of low isolated property at the light reflex time, and the feelings of multi-wavelength applications are had a big insertion loss.Perhaps, make the structure complicated of bi-directional light amplification module, and extendibility is extremely low.
Summary of the invention:
Technical problem to be solved by this invention provides a kind of bi-directional wavelength optical function module that is inserted into loss property and high light isolation that has, and this module can make its channel number expand at an easy rate under the situation of the complexity that does not increase system.The technical scheme that the present invention solves its technical problem employing is: bi-directional wavelength optical function module, which comprises at least a wavelength management module, this wavelength management module has the plurality of ports end, this wavelength management module is that optics is coupled between first optical transceiver and second transceiver, this first with this second optical transceiver first and second optical channel is provided respectively, and this first with this second optical channel can be in order to transmit the light signal of a plurality of different wave lengths; And comprise a unidirectional optical function module at least with the isolated function of light, be coupled between some port end of this wavelength management module.Task proposed by the invention also can further be realized by following technical solution: bi-directional wavelength optical function module, the individual event optical function module that wherein has the isolated function of light is a light amplification module, is coupled between those port end of this wavelength management module; The individual event optical function module that wherein has the isolated function of light is an optical dispersion compensator, and optics is coupled between some port end of this wavelength management module; Wherein this optical dispersion compensator is to comprise a light circulator and a fiber grating; Wherein this light circulator of this optical dispersion compensator is to have three ports; Wherein this light circulator of this optical dispersion compensator is to have six ports; Wherein this wavelength management module comprises the multiplexer of window partial wave more than; Which comprises at least a wavelength management module, this wavelength management module has the plurality of ports end, this wavelength management module is that optics is coupled between first optical transceiver and second optical transceiver, this first with this second optical transceiver first and second optical channel is provided respectively, and this first with this second optical channel can be in order to transmit the light signal of a plurality of different wave lengths; At least comprise a unidirectional optical function module, be coupled between some port end of this wavelength management module; And comprise that at least a light excluder, optics are coupled between this unidirectional optical function module and this wavelength management module; Wherein this unidirectional optical function module comprises at least one optical access module, and optics is coupled between the port end of this wavelength management module; Wherein this unidirectional optical function module comprises at least one unidirectional smooth commissure device, and optics is coupled between the port end of this wavelength management module; Wherein this wavelength management module comprises the multiplexer of window partial wave more than; It comprises a plurality of wavelength management modules, these wavelength management modules have a plurality of ports end, first port end of these wavelength management modules is to couple with one first optical transceiver, the another port end of wavelength management module is to couple with one second optical transceiver optics, first and second optical transceiver provides first and second optical channel respectively, and this first can be used to transmit the light signal of a plurality of different wave lengths with this second optical channel, and comprise a unidirectional wavelength commissure device at least, optics is coupled between the port end of these wavelength management modules, and comprise that a plurality of smooth excluders, optics are coupled between the 3rd port end of this unidirectional wavelength commissure device and these wavelength management modules; Wherein these wavelength management modules comprise at least one many windows partial wave multiplexer; Wherein these wavelength management modules, light excluder number are consistent with the input optical fibre number of trunks.The present invention comprises a wavelength management module at least, this wavelength management module has first, second, the the 3rd and the 4th port end, first port end system of wavelength management module couples with the first optical transceiver optics, the 4th port end system of wavelength management module couples with the second optical transceiver optics, wherein first and second optical transceiver provides first and second optical channel respectively, and first and second optical channel is all in order to transmit the light signal of several different wave lengths, several optical paths, optics is coupled to first port end and the 4th port end of wavelength management module, and comprise a light amplification module at least, be coupled between the second and the 3rd port end of wavelength management module.Task proposed by the invention also can further be realized by following technical solution: bi-directional wavelength optical function module, which comprises at least a wavelength management module, this wavelength management module has one first, one second, one the 3rd and one the 4th port end, first port end system of this wavelength management module couples with the first optical transceiver optics, the 4th port end system of this wavelength management module couples with the second optical transceiver optics, this first and second optical transceiver provides first and second optical channel respectively, and this first with this second optical channel all in order to transmit the light signal of a plurality of different wave lengths, a plurality of optical paths, optics is coupled to this first port end and the 4th port end of this wavelength management module, at least comprise an optical access module, optics is coupled between this second and the 3rd port end of this wavelength management module; And at least one light excluder, optics is coupled between the 3rd port end of this optical access module and this wavelength management module; This wavelength management module has one first, one second, one the 3rd and one the 4th port end, first port end system of this wavelength management module couples with the first optical transceiver optics, the 4th port end of wavelength management module is to couple with the second optical transceiver optics, wherein first and second optical transceivers provide first and second optical channels respectively, and first and second optical channels are all in order to transmit the light signal of several different wave lengths, several optical path optics are coupled to first port end and the 4th port end of wavelength management module, at least one optical dispersion compensator, optics are coupled between the second and the 3rd port end of wavelength management module; This wavelength management module has the first, second, third and the 4th port end, first port end of wavelength management module is to couple with the first optical transceiver optics, the 4th port end of wavelength management module is to couple with the second optical transceiver optics, wherein first and second optical transceivers provide first and second optical channels respectively, and first and second optical channels are all in order to transmit the light signal of several different wave lengths.Several optical paths are first port end and the 4th port end that optics is coupled to wavelength management module.At least one unidirectional wavelength commissure device, its optics is coupled between the second and the 3rd port end of wavelength management module.And at least one light excluder, its optics is coupled between the 3rd port end of unidirectional wavelength commissure device and wavelength management module.In sum, the present invention is owing to adopt technique scheme, therefore compare with known technology and have following advantage and effect: its channel number, that is the light signal number of manageable different wave length can expand easily, and can not increase the complexity of system, the advantage that also has the loss of being inserted into, high light isolation, and two light signal nodes (optical transceiver) transmit the light signal that receives all can be by twice of wavelength management module.Therefore, isolation effect can also improve twice.
Description of drawings:
Below in conjunction with accompanying drawing and specific embodiments of the invention the present invention is described in further detail:
Fig. 1 is a kind of known pair of fiber transmission device, in order to transmit the light signal that receives several different wave lengths;
Fig. 2 is a kind of structure of known two-way amplifier module, and it utilizes an EDFA amplifier and several partial wave multiplexers;
Fig. 3 is a kind of known light communication system structure chart, and it utilizes the partial wave multitask filter (four-port WDM filter) at one or four ports and single EDFA amplifier to finish;
Fig. 4 is the partial wave multitask Filter Structures figure at four ports among Fig. 3, in order to its mode of operation to be described;
Fig. 5 is a kind of framework of known bi-directional light amplification module;
Fig. 6 is a kind of framework of known light amplification module;
Fig. 7 is the Organization Chart of a kind of light communication system of preferred embodiment of the present invention;
Fig. 8 is the first kind of structure that can implement of the bi-directional wavelength optical function module structure in the framework of the light communication system of Fig. 7 of preferred embodiment of the present invention;
Fig. 9 is the frequency spectrum of the light signal of a typical wavelength management module (MWDM);
Figure 10 A is the second kind of structure that can implement of the bi-directional wavelength optical function module structure in the framework of the light communication system of Fig. 7 of preferred embodiment of the present invention, and it can fill in extract operation to the light signal of one or more specific wavelength;
Figure 10 B and Figure 10 C are respectively the spectrum diagram under the framework that does not have the light excluder among Figure 10 A and the light excluder is arranged;
Figure 11 is the third structure that can implement of the bi-directional wavelength optical function module structure in the framework of the light communication system of Fig. 7 of preferred embodiment of the present invention, and it can be to causing that light signal chromatic dispersion (chromatic dispersion) phenomenon is compensated because long-range is transmitted institute;
Figure 12 is preferred embodiment of the present invention, organizes bi-directional light communication systems and light signal it has at different transmission paths, the system architecture that each light signal can be exchanged in different transmission paths more;
Figure 13 is the framework of bi-directional wavelength optical commissure device among Figure 12.
With reference to Fig. 1～Figure 13.The present invention includes:
10 light communication system 12a, first optical transceiver
The 12b second optical transceiver 14a, 14b light transmission path
16 EDFA amplifiers, 20 light communication systems
21a, 21b optical transceiver
22a, 22b, 22c partial wave multiplexer (WDM)
23a, 23b, 23c partial wave multiplexer (WDM)
24 EDFA amplifiers, 26,28 transmission paths
30a, 30b optical transceiver 35 4 port partial wave multitask filters
32a, 32b partial wave multiplexer (WDM)
36 EDFA amplifiers, 37,38 light transmission paths
34 amplification module 35a substrates
35b lens 50a, 50b light circulator
52a, 52b amplifier 60a, 60b connector
62a, 62b four port partial wave multitask filters
64a, 64b light transmission path 66a, 66b fiber grating
100 light communication system structures, 110,120 optical transceivers
112a, 122a transmitting terminal 112b, 122b receiving terminal
114a, 124b light multiplexer 114b, 124a photodissociation multiplexer
116,126 light circulators, 130 optical function modules
132,134 light transmission paths, 140 wavelength management modules
142 EDFA amplifiers, 144,146 light transmission paths
150 wavelength management modules, 152,158 light transmission paths
154 optical access devices, 156 smooth excluders
160 wavelength management module 162a, 162b light transmission path
164 light circulator 164a light transmission paths
166 dispersion compensators, 200 light communication system structures
210,220 optical nodes, 212,222 optical transceivers
214,224 light transmission paths, 230 bi-directional wavelength optical commissure devices
240a, 240b wavelength management module 242a～242d light transmission path
244 unidirectional wavelength light commissure devices
Embodiment:
Embodiment please refer to Fig. 7, and it is according to the Organization Chart of the light communication system of preferred embodiment of the present invention.This light communication system 100 comprises first optical transceiver module 110, second optical transceiver module 120 and optical function module (optical function module) 130.First optical transceiver module 110 comprises a plurality of smooth signal reflector 112a, is λ 1 in order to emission wavelength respectively, and λ 3 ..., the light signal of λ 2n-1, and input to light multiplexer (optical MUX) 114a via optical fiber.Effect via light multiplexer 114a, with all wavelengths is λ 1, and λ 3 ..., the combination in addition of the light signal of λ 2n-1 (n is an integer), and be sent to three port light circulators (three-port optical circulator) 116 via optical guided wave (optical wave guide) device.Three port light circulators 116 are a kind of unidirectional light path conversion equipments, when for example the light signal is by port end 1 input, and just by next port end, that is 2 outputs of port end; And the light signal is during by port end 2 input, just by next port end, that is 3 outputs of port end.Therefore, when the light signal that will export as light multiplexer 114a is sent to the port end 1 of light circulator 116 via the optical guided wave device, just with of port end 2 outputs of this light signal by light circulator.Afterwards, by light transmission path 132 the light signal is input to optical function module 130, the light signal after handling via optical function module just is input to second optical transceiver 120.
The structure of second optical transceiver 120 communicates with the framework of first optical transceiver.Second optical transceiver 120 is after receiving signal, and just the port end 2 via light circulator 126 receives and exported by port end 3, sends photodissociation multiplexer (optical demultiplexer) 124a to via the optical guided wave device.At this moment, photodissociation multiplexer 124a is just resolved into the light signal that is received the light signal of each wavelength, that is each the light signal reflector 112a institute emission wavelength in first optical transceiver 110 is λ 1, and λ 3 ..., the light signal of λ 2n-1.The light signal of each wavelength that resolves into via photodissociation multiplexer 124a is then received by several optical receivers 122a respectively.
Light signal that above-mentioned optical transceiver 110 is sent system be referred to as the to take a message light signal of breath (information-bearing), that is it can comprise acoustic information, image information or computer data or the like, all can be transmitted so long as can see through the data that the optical delivery medium transmit.
Otherwise, the light signal of different wave length (λ 2, and λ 4 ..., λ 2m, m are integer) can penetrate respectively by several optical transmitting sets 122b of second optical transceiver 120, via light multiplexer 124b in addition in conjunction with, be directed to optical function module 130 by light circulator 126.Afterwards, receive by several optical receivers 112b of first optical transceiver 110 again.This process just no longer describes in detail as hereinbefore.
The product that 116,126 of above-mentioned light circulators can use widely used Canadian JDS-Fitel company of existing market or sage lotus west, California E-Tek etc. to be produced.132,134 of optical transmission lines can use single mode (single mode) optical fiber, for example Corning, AT ﹠amp; The product of the SMF-28 model that company produced such as T/LucentTechnologies.In addition, the optical guided wave device that can transmit multi-wavelength also can be used for as optical transmission line 132,134.
In above stated specification, can use single or a plurality of in order to the optical function module 130 that connects first and second optical transceiver 110,120.This optical function module 130 has to be needed multi-functionally, for example amplification of light signal, the multiple wavelength light signal plug is got (add ﹠amp; Drop) go out the dispersion compensation (dispersion compensation) of one or more special wavelength, input light signal or carry out wavelength exchange or the like function from a plurality of transmission paths.This optical function module 130 also is emphasis of the present invention place.Several frameworks that can implement of optical function module 130 below will be described in detail in detail.
Fig. 8 has provided the first kind of structure that can implement of the optical function module 130 in the framework of light communication system 100 of Fig. 7 of preferred embodiment of the present invention.Optical function module 130 shown in the 8th figure is made of wavelength management module (optical managing module) 140 and image intensifer 142.Wavelength management module 140 has four port,input-output end P1～P4.Wherein port end P1 is that optics is coupled to transmission line 132, can be used for receiving the wavelength X 1 shown in the 7th figure, and λ 3, ..., the light signal of λ 2n-1 or output λ 2, λ 4, ..., the light signal of λ 2m, port end P4 then optics are coupled to transmission line 134, can be used for receiving the wavelength X 2 shown in the 7th figure, λ 4 ..., the light signal of λ 2m or output λ 1, λ 3 ..., the light signal of λ 2n-1.
The port end P2 of wavelength management module 140 then is coupled to the input of image intensifer 142, and the output of image intensifer 142 then is coupled to the port end P3 of wavelength management module 140.Image intensifer 142 and the port end P2 of wavelength management module 140 then can for example be connected with optical fiber or optical guided wave device respectively with light transmission path between the P3.Light transmission path 144,146 can be used for transmitting all wavelengths λ 1, and λ 2 ..., the light signal of λ 2m, image intensifer 142 then can be used for handling all wavelengths λ 1, and λ 2 ..., the light signal of λ 2m.In addition, light transmission path 144,146 is an one-way transmission path.
At image intensifer 142, it can be typical erbium-based amplifier (EDFA), it comprises light excluder (optical isolator), partial wave multiplexer WDM (980/1550nm or 1480/1550nm), Er-doped fiber (erbium-doped) and pumping source (pump source), as the laser diode of 980nm or 1480nm.Wavelength management module 140 shown in Figure 8 is the partial wave of window more than a multiplexer (multi-window wavelength division multiplexer, MWDM), it can utilize optical fiber to draw awl to fuse technology (fused-biconical taper, FBT) or non-equilibrium Mach-Zehnder interferometer (unbalanced Mach-ZehnderInterferometer, UMZI) technology is made.
Fig. 9 system illustrates the frequency spectrum of the light signal of a typical wavelength management module (MWDM).When white light was input to the port end P1 of MWDM module, the wavelength in the frequency spectrum was λ 1, and λ 3 ..., the light signal of λ 2n-1 (odd number) just can come across port end P2, and wavelength is λ 2, and λ 4 ..., the light signal of λ 2m (even number) just can come across port end P3.According to the symmetry characteristic of MWDM module, when white light was input to the port end P3 of MWDM module, the wavelength in the frequency spectrum was λ 1, and λ 3, ..., the light signal of λ 2n-1 just can come across port end P4, and wavelength is λ 2, λ 4 ..., the light signal of λ 2m just can come across port end P1.
Because the light signal of first optical transceiver 110 and second optical transceiver 120 all can pass through MWDM module twice, so the channel of light signal isolated (channelisolation) also can double.
Figure 10 A has provided the second kind of structure that can implement of the optical function module 130 in the framework of light communication system 100 of Fig. 7 of preferred embodiment of the present invention, and it can be filled in the light signal of one or more specific wavelength and get (adding ﹠amp; Dropping) operation.
If when light excluder 156 does not dispose, can cause the isolated degree of light unstable.For example do not keep one-way transmission from port end P2 to port end P3, then the optical fiber during or assembly just can cause the instability of light signal as long as change the polarization state of transmission signals a little.For example shown in the 10B figure, when moving optical fiber between port end P2 and port end P3, its frequency spectrum just can change.Otherwise, added light excluder 156 after, by wavelength management module 2 times, its isolated degree is darker, shown in wavelength X 2 parts of Figure 10 C.
Enter the port end P1 of wavelength management module 140 from the light signal of first optical transceiver, 110 inputs, and pass through wavelength management module 140, and leave, be sent to optical access multiplexer 154 by transmission line 152 again from its port end P2.In like manner, the light signal of importing from second optical transceiver 120 enters the port end P4 of wavelength management module 140, and passes through wavelength management module 140, and leaves from its port end P2, is sent to optical access multiplexer 154 by transmission line 152 again.Therefore, just can export in conjunction with wavelength at port end P2 is λ 1, and λ 2 ..., the light signal of λ 2m.After these light signals pass through optical access multiplexer 154 subsequently, just the light signal of one or more specific wavelength is filled in extract operation.Afterwards, process light excluder 156 is at the port end P3 that inputs to wavelength management module 140.Then, light signal medium wavelength is λ 1, and λ 3 ..., the light signal of λ 2n-1 just exports second optical transceiver 120 to from port end P4, and light signal medium wavelength is λ 2, and λ 4 ..., the light signal of λ 2m just exports first optical transceiver 120 to from port end P1.
Above-mentioned light excluder 156 is to be used for keeping the light signal to avoid in wavelength management module 140 because the caused noise of interference effect to being sent to port end P3 from port end P2, using with folk prescription.
When light communication system was applied to the length Distance Transmission, the length of transmission line was usually up to several hundred kilometers.And because long Distance Transmission, the light signal that contains multi-wavelength just can cause dispersion phenomenon, makes the waveform change of light signal, can't keep the waveform that sends from transmitting terminal.This just can cause information loss or distortion in the signal.Therefore, the long-range transmission system is just needed compensation arrangement and come the compensation of dispersion effect.
Figure 11 has provided the third structure that can implement of the optical function module 130 in the framework of light communication system 100 of Fig. 7 of preferred embodiment of the present invention, and it can be to because long-range transmission institute cause that light signal chromatic dispersion (chromatic dispersion) phenomenon is compensated.
The mode of operation of wavelength management module 160, foregoing example is identical, does not repeat them here.When the light signal that is combined into single signal (comprise wavelength X 1, λ 2 ..., the light signal of λ 2m) enter the port end 1 of three port circulators 164 via transmission line 162a after, just via 2 outputs of port end.The light signal of output is sent to the wave mode reformation that dispersion compensator 166 carries out the light signal via transmission line 164a again, makes because the long-range transmission makes the waveform answer of light signal distortion.Light signal after waveform is reformed by the reflection of dispersion compensator 166, reaches the port end 2 of three port circulators 164 by transmission line, again by 3 outputs of port end, and is sent to the port end P3 of wavelength management module 160 via transmission line.Then, light signal medium wavelength is λ 1, and λ 3 ..., the light signal of λ 2n-1 just exports second optical transceiver 120 to from port end P4, and light signal medium wavelength is λ 2, and λ 4 ..., the light signal of λ 2m just exports first optical transceiver 120 to from port end P1.
Aforementioned lights circulator 164 does not also limit the light circulator that uses three port ends, and the light circulator of six port ends also is spendable framework.
Below will illustrate when many groups bi-directional light communication system, and the light signal is when different transmission paths a kind of system architecture how the light signal exchanges at these different transmission paths.
Figure 12 has provided preferred embodiment of the present invention, organizes bi-directional light communication systems and light signal it has at different transmission paths, the system architecture that each light signal can be exchanged in different transmission paths more.
This framework 200 comprises the first smooth transmitting-receiving node 210, it has a plurality of first optical transceivers 212, #1～#k for example shown in Figure 12, and the second smooth transmitting-receiving node 220, it has a plurality of second optical transceivers 222, #1～#k for example shown in Figure 12, in first and second light transmitting-receiving node, the number of first and second optical transceiver that comprises individually system is consistent.First and second light transmitting-receiving node all utilizes a plurality of light transmission paths 214,224 to be coupled to bi-directional wavelength optical commissure device (bidirectional wavelength crossconnect) 230.In practical application, can use one or more configurations to come framework bi-directional wavelength optical commissure device 230.
Each optical transceiver 212 of the first smooth transmitting-receiving node 210, the optical transceiver 212 of for example numbering # 1 can see through light transmission path 214, and to send wavelength be λ 1, λ 3, ..., the light signal of λ 2n-1 is to bi-directional wavelength optical commissure device 230, and the wavelength that receives from bi-directional wavelength optical commissure device 230 is λ 2, and λ 4, ..., the light signal of λ 2m.Otherwise, each optical transceiver 222 of the second smooth transmitting-receiving node 220, the optical transceiver 222 of for example numbering # 1 can see through light transmission path 224, and to send wavelength be λ 2, λ 4 ..., the light signal of λ 2m is to bi-directional wavelength optical commissure device 230, and the wavelength that receives from bi-directional wavelength optical commissure device 230 is λ 1, λ 3 ..., the light signal of λ 2n-1.
230 of bi-directional wavelength optical commissure devices can be sent to the light signal that is sent from a two-way light communication system another bi-directional light communication system.For example, bi-directional wavelength optical commissure device 230 can be λ 1 with one of them first optical transceiver 212 wavelength of sending in the first smooth transmitting-receiving node 210, λ 3, ..., the light signal of λ 2n-1, be sent to any one second optical transceiver 222 in the second smooth transmitting-receiving node 220 via bi-directional wavelength optical commissure device 230, as numbering #1～#k.In order more to know the operating principle of bi-directional wavelength optical commissure device 230, the framework of bi-directional wavelength optical commissure device will be described below.
Figure 13 illustrates the framework of bi-directional wavelength optical commissure device among Figure 12.Bi-directional wavelength optical commissure device 230 comprises a plurality of wavelength management modules (as the first wavelength management module 240a, a k wavelength management module 240b), a unidirectional wavelength light commissure device (unidirectional wavelengthoptical crossconnect) 244 and a plurality of smooth excluders 246.Aforementioned as shown in figure 13, the port end P1 of the one or four port wavelength management module 240a of bi-directional wavelength optical commissure device 130 is coupled to the transmission path 214 of the numbering #1 in the first smooth transmitting-receiving node 210, and port end P4 is coupled to the transmission path 224 of the numbering #1 in the second smooth transmitting-receiving node 220.The port end P2 of the one or four port wavelength management module 240a then is coupled to the numbering #1 input of unidirectional wavelength light commissure device 244 via transmission path 242a, this input number is consistent with the numbering of transmission path 214 with each first optical transceiver 212 in the first smooth transmitting-receiving node 210 with numbering.A plurality of output #1～#k of unidirectional wavelength light commissure device 244 then are coupled to a smooth excluder 246 respectively, and the output of each light excluder 246 is coupled to the port end P3 of four port wavelength management modules of numbering separately more respectively.
The port end P1 of the numbering #k four port wavelength management module 240b of unidirectional wavelength light commissure device 244 is coupled to the transmission path 214 of the numbering #k in the first smooth transmitting-receiving node 210, and port end P4 is coupled to the transmission path 224 of the numbering #k in the second smooth transmitting-receiving node 220.The port end P2 of the four port wavelength management module 240b of numbering #k then is coupled to the numbering #k input of unidirectional wavelength light commissure device 244 via transmission path 242c.The port end P3 of the four port wavelength management module 240b of numbering #k then is coupled to the output of numbering #k light excluder 246 via transmission path 242d.
That is, if when the first above-mentioned smooth transmitting-receiving node 210 and the second smooth transmitting-receiving node 220 dispose k group fiber optic backbone,, import port and k output port (#1～#k) just then unidirectional wavelength commissure device 244 needs k as numbering #1～#k.The port,input-output of each numbering #k all couples a wavelength management module, be connected to the I/O port of unidirectional wavelength commissure device 244 numbering # 1 as wavelength management module 240a, wavelength management module 240b is connected to the port,input-output of unidirectional wavelength commissure device 244 numbering #k, and all the other numbering #k then represent with dotted line.
According to above-mentioned structure, in that to comprise wavelength be λ 1 in conjunction with being sent by first optical node 210, λ 3, ..., the light signal of λ 2n-1 comprises wavelength X 2 with being sent by second optical node 220, and λ 4 ..., after the light signal of λ 2m, just (#1～#k) sends unidirectional wavelength light commissure device 244 to along light transmission path 242a by port end P2 output.Each wavelength (λ 1, and λ 2 ..., λ 2m) just can rearrange and exchange to another channel entering unidirectional wavelength light commissure device 244 according to preset condition.For example, wavelength by first optical transceiver 212 (#1) of first optical node 210 is the light signal of λ 1, just can rearrange second optical transceiver 222 (#2) that exchanges to second optical node 220 according to preset condition entering unidirectional wavelength light commissure device 244, and wavelength still is the light signal of λ 1; And be the light signal of λ 1 by the wavelength of first optical transceiver 212 (#2) of first optical node 210, just can rearrange second optical exchanger 212 (#2) that exchanges to second optical node 220 according to preset condition entering unidirectional wavelength light commissure device 244, and wavelength still is the light signal of λ 1.Or, wavelength by first optical transceiver 212 (#2) of first optical node 210 is the light signal of λ 1, just can rearrange second optical transceiver 222 (#3) that exchanges to second optical node 220 according to preset condition entering unidirectional wavelength light commissure device 244, and wavelength still is the light signal of λ 1; And be the light signal of λ 1 by the wavelength of first optical transceiver 212 (#3) of first optical node 210, just can rearrange second optical transceiver 222 (#1) that exchanges to second optical node 220 according to preset condition entering unidirectional wavelength light commissure device 244, and wavelength still is the light signal of λ 1.
After the light signal of each wavelength that will import exchanges, through each transmission paths 242 behind the light excluder 246 (the light signal on the #1～#k) still comprises wavelength X 1, and λ 2 ..., the single smooth signal that the light signal of λ 2m is formed.The light signal of this combination just is sent to the port end P3 of wavelength management module separately.Wherein, comprise wavelength X 1, λ 3 ..., the light signal of λ 2n-1 just is sent to second optical node 220 via the port end P4 of wavelength management module separately via transmission path 224, or is sent to second optical node 220 via the port end P4 of wavelength management module separately via transmission path 224.In addition, comprise wavelength X 2, λ 4 ..., the light signal of λ 2m just is sent to first optical node 210 via the port end P1 of wavelength management module separately via transmission path 214.
Generally speaking, unidirectional wavelength light commissure device 244 is by handling wavelength X 1, λ 2, ..., several separate multiplexer and multiplexer the light signal of λ 2m, and several many ports light shifters constitute, and for example are k group multitask-separate the multiplexer combination at this embodiment, and (m+n) light shifter at individual kxk port (input of k port and the output of k port).
In sum, though the present invention is disclosed with preferred embodiment, so it is not to be enough to limit the present invention; any those skilled in the art; can under the situation that does not break away from the principle of the invention, do some and change and retouching, so the protection range that the present invention works as with claims be as the criterion.
Claims (14)
1. bi-directional wavelength optical function module, it is characterized in that: which comprises at least a wavelength management module, this wavelength management module has the plurality of ports end, this wavelength management module is that optics is coupled between first optical transceiver and second transceiver, this first with this second optical transceiver first and second optical channel is provided respectively, and this first with this second optical channel can be in order to transmit the light signal of a plurality of different wave lengths; And comprise a unidirectional optical function module at least with the isolated function of light, be coupled between some port end of this wavelength management module.
2. bi-directional wavelength optical function module according to claim 1 is characterized in that: the individual event optical function module that wherein has the isolated function of light is a light amplification module, is coupled between those port end of this wavelength management module.
3. bi-directional wavelength optical function module according to claim 1 is characterized in that: the individual event optical function module that wherein has the isolated function of light is an optical dispersion compensator, and optics is coupled between some port end of this wavelength management module.
4. bi-directional wavelength optical function module according to claim 3 is characterized in that: wherein this optical dispersion compensator is to comprise a light circulator and a fiber grating.
5. bi-directional wavelength optical function module according to claim 4 is characterized in that: wherein this light circulator of this optical dispersion compensator is to have three ports.
6. bi-directional wavelength optical function module according to claim 4 is characterized in that: wherein this light circulator of this optical dispersion compensator is to have six ports.
7. bi-directional wavelength optical function module according to claim 1 is characterized in that: wherein this wavelength management module comprises the multiplexer of window partial wave more than.
8. bi-directional wavelength optical function module, it is characterized in that: which comprises at least a wavelength management module, this wavelength management module has the plurality of ports end, this wavelength management module is that optics is coupled between first optical transceiver and second optical transceiver, this first with this second optical transceiver first and second optical channel is provided respectively, and this first with this second optical channel can be in order to transmit the light signal of a plurality of different wave lengths; At least comprise a unidirectional optical function module, be coupled between some port end of this wavelength management module; And comprising a light excluder at least, optics is coupled between this unidirectional optical function module and this wavelength management module.
9. bi-directional wavelength optical function module according to claim 8 is characterized in that: wherein this unidirectional optical function module comprises at least one optical access module, and optics is coupled between the port end of this wavelength management module.
10. bi-directional wavelength optical function module according to claim 8 is characterized in that: wherein this unidirectional optical function module comprises at least one unidirectional smooth commissure device, and optics is coupled between the port end of this wavelength management module.
11. bi-directional wavelength optical function module according to claim 8 is characterized in that: wherein this wavelength management module comprises the multiplexer of window partial wave more than.
12. bi-directional wavelength optical function module, it is characterized in that: it comprises a plurality of wavelength management modules, these wavelength management modules have a plurality of ports end, first port end of these wavelength management modules is to couple with one first optical transceiver, the another port end of wavelength management module is to couple with one second optical transceiver optics, first and second optical transceiver provides first and second optical channel respectively, and this first can be used to transmit the light signal of a plurality of different wave lengths with this second optical channel; And comprising a unidirectional wavelength commissure device at least, optics is coupled between the port end of these wavelength management modules; And comprising a plurality of smooth excluders, optics is coupled between the 3rd port end of this unidirectional wavelength commissure device and these wavelength management modules.
13. bi-directional wavelength optical function module according to claim 12 is characterized in that: wherein these wavelength management modules comprise at least one many windows partial wave multiplexer.
14. bi-directional wavelength optical function module according to claim 12 is characterized in that: wherein these wavelength management modules, light excluder number are consistent with the input optical fibre number of trunks.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106506086A (en) * | 2016-07-11 | 2017-03-15 | 索尔思光电（成都）有限公司 | Light is to optical transceiver and production and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106506086A (en) * | 2016-07-11 | 2017-03-15 | 索尔思光电（成都）有限公司 | Light is to optical transceiver and production and preparation method thereof |
| WO2018010232A1 (en) * | 2016-07-11 | 2018-01-18 | Source Photonics (Chengdu) Company Limited | Optical-to-optical transceiver and methods of making and using the same |
| CN106506086B (en) * | 2016-07-11 | 2019-02-01 | 索尔思光电（成都）有限公司 | Light is to optical transceiver and production and preparation method thereof |
| US10355783B2 (en) | 2016-07-11 | 2019-07-16 | Source Photonics (Chengdu) Co., Ltd. | Optical-to-optical transceiver and methods of making and using the same |
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