CN100372274C - Two-way add and drop multiplexer module - Google Patents
Two-way add and drop multiplexer module Download PDFInfo
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- CN100372274C CN100372274C CNB03121052XA CN03121052A CN100372274C CN 100372274 C CN100372274 C CN 100372274C CN B03121052X A CNB03121052X A CN B03121052XA CN 03121052 A CN03121052 A CN 03121052A CN 100372274 C CN100372274 C CN 100372274C
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Abstract
The present invention discloses a two-way single wavelength division multiplexing module which is formed by combining and connecting two four-port optical circulators, two three-port optical circulators, and two reflection filters for reflecting optical signals with certain wavelength. The present invention also discloses a two-way multiple wavelength division multiplexing module formed by the concatenation of a plurality of two-way division multiplexing modules, wherein two division multiplexing modules in concatenation share the same four-port optical circulator, and two three-port optical circulators are additionally arranged between the two division multiplexing modules. In addition, the present invention also discloses a two-way multiple wavelength division multiplexing module using at least one division multiplexing module in concatenation to realize the simultaneous division multiplex of single or multiple wavelength optical signals in a two-way optical transmission system; and therefore, the system structure for optical transmission is simplified, both the system reliability and the utilization rate of devices are increased, the cost is reduced, the dynamic adjustability of the upper and lower wavelengths of optical signals is further realized through an all optical structure, and the system flexibility is enhanced.
Description
Technical field
The present invention relates to Wave division multiplexing optical transmission system, be meant a kind of two-way add-drop multiplexing module that is applicable to that single wavelength or multi-wavelength are handled in the Wave division multiplexing optical transmission system especially.
Background technology
The road up and down of in wavelength division multiplexing (WDM) and dense wave division multipurpose (DWDM) optical transmission system, usually adopting add-drop multiplexing module (OADM) to realize wavelength of optical signal, and then light signal carried out chromatic dispersion and power back-off operation.
Referring to shown in Figure 1, be a kind of structural representation of traditional add-drop multiplexing module.Form the light signal λ of multi-wavelength by two three ports light rings 101 and an optical fiber Bragg (Bragg) grating 102
1, λ
2... λ
i... λ
nEnter from 1 port of going into end three ports light rings 101, output to optical fiber Bragg raster 102, suppose that 102 of optical fiber Bragg rasters are λ to wavelength from 2 ports
iLight wave reflection, then wavelength is λ
iLight signal reflection, the light signal λ of its commplementary wave length
1, λ
2... λ
nTransmission is crossed 2 ports that optical fiber Bragg raster 102 enters into out end three ports light rings 101 and is entered, and exports from 3 ports.And wavelength is λ
iLight signal be back into 2 ports of three ports light rings 101 of end after being reflected, and from its 3 port output, thus the following road of realizing light signal.Setting out on a journey of light signal is similar with the realization principle on following road, the light signal λ that need set out on a journey
iArrive optical fiber Bragg raster 102, light signal λ through 1,2 ports that go out end three ports light rings 101
iBy after optical fiber Bragg raster 102 reflection through going out 2,3 ports of end three ports light rings 101, output and λ
1, λ
2... λ
nClose ripple, thereby finish setting out on a journey of light signal.
Along with the development of DWDM technology, in order to save the cost of two fine bi-directional dwdm systems, improve system availability, the single fiber bi-directional DWDM fiber optic transmission system of the opposite multiple wavelength optical signal of on optical fiber transmission direction has simultaneously appearred.Yet, the He Xialu that sets out on a journey for the opposite wavelength of optical signal that transmits of both direction still adopts similar traditional unidirectional add-drop multiplexing module shown in Figure 1 to realize respectively at present, that is: adopt two independently add-drop multiplexing modules, this just needs two independent particle systems of employing to realize operations such as the loss balancing of single fiber bi-directional DWDM fiber optic transmission system, dispersion compensation respectively, thereby cause the system configuration complexity, reliability is relatively poor.So, single fiber bi-directional DWDM fiber optic transmission system has only improved the optical fiber utilance, and the utilance of device and subsystem does not improve, and therefore compares with the two-way dwdm system of two fibres, and system cost is difficult to reduce significantly.In addition, the add-drop multiplexer that adopts in the system is about the fixed wave length substantially at present, so service dispatching underaction, resource distribution is restricted, even some systems have realized about the dynamic wavelength, but still basic what adopt is photoelectricity light (O/E/O) wavelength Conversion, causes the system results complexity, and cost is difficult to reduce.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of two-way add-drop multiplexing module, add drop multiplex when making it can adopt standalone module to realize in the two-way optical transmission system single wavelength or multiple wavelength optical signal, thereby simplify the optical transmission system structure, and then the utilance of increase system reliability and device, reduce cost.
An aspect according to above-mentioned purpose the present invention proposes a kind of two-way single wavelength add-drop multiplexing module, be arranged in optical-fibre channel, it is characterized in that comprising at least: the 1 four port light path selector, the 2 four port light path selector, the 1 three port light path selector, the 2 three port light path selector, be used to reflect the 1st reflective filter and the 2nd reflective filter of certain wavelength light signal; The 1st port of described the 1 four port light path selector is connected to an I/O end of optical-fibre channel, the 2nd of the 1 four port light path selector, the 4th port connects the 1st port of described the 1st reflective filter and the 2nd reflective filter respectively, the 1st reflective filter and the 2nd reflective filter the 2nd port be connected to the 4th of the 2 four port light path selector respectively, the 2nd port, the 1st port of the 2 four port light path selector is connected to another I/O end of optical-fibre channel, the 3rd port of described the 1 four port light path selector connects the 1st port of described the 1 three port light path selector, the 2nd port of the 1 three port light path selector is a road port under the light signal, the 3rd port of the 1 three port light path selector is a road port on the light signal, the 3rd port of described the 2 four port light path selector connects the 2nd port of described the 2 three port light path selector, the 1st port of the 2 three port light path selector is a road port on the light signal, and the 3rd port of the 2 three port light path selector is a road port under the light signal.
This two-way single wavelength add-drop multiplexing module further comprises: two wavelength shifters that are used for any wavelength light signal of setting out on a journey is converted to certain wavelength light signal, wavelength shifter is connected on the 3rd port of described the 1 three port light path selector and the light signal between the road port, and another wavelength shifter is connected on the 1st port of described the 2 three port light path selector and the light signal between the road port.
The described wavelength shifter of this two-way single wavelength add-drop multiplexing module is made of semiconductor optical amplifier or NOLM.
The described reflective filter of this two-way single wavelength add-drop multiplexing module is the tunable fiber Bragg grating that has controller.
The described controller of this two-way single wavelength add-drop multiplexing module is temperature controller or stress controller.
The described light path selector of this two-way single wavelength add-drop multiplexing module is an optical circulator.
Another aspect according to the object of the invention, the invention provides a kind of two-way multi-wavelength add-drop multiplexing module, it is characterized in that comprising: two or more are used for three port light path selectors of cascade, two or two and the described two-way single wavelength add-drop multiplexing module of above claim 1; Per two two-way single wavelength add-drop multiplexing modules carry out cascade by the 1 three port light path selector that is used for cascade and the 2 three port light path selector that is used for cascade; All two-way single wavelength add-drop multiplexing modules are cascaded, shared one the four port light path selector of former and later two two-way single wavelength add-drop multiplexing modules, the 1st port of these shared four port light path selectors is connected to the 2nd port of the 2 three port light path selector of last two-way single wavelength add-drop multiplexing module, the 3rd port of these shared four port light path selectors is connected to the 1st port of the 1 three port light path selector of back one two-way single wavelength add-drop multiplexing module, is connected with described the 1 three a port light path selector that is used for cascade between the 2nd port of these shared four port light path selectors and the 1st reflective filter of former and later two two-way single wavelength add-drop multiplexing modules; Described the 1st port that is used for the 1 three port light path selector of cascade is connected to the 2nd port of the 1st reflective filter of last two-way single wavelength add-drop multiplexing module, described the 2nd port that is used for the 1 three port light path selector of cascade is connected to the 1st port of the 1st reflective filter of back one two-way single wavelength add-drop multiplexing module, and described the 3rd port that is used for the 1 three port light path selector of cascade is connected with the 2nd port of these shared four port light path selectors; Be connected with the 2 three port light path selector that is used for cascade between the 4th port of these shared four port light path selectors and the 2nd reflective filter of former and later two two-way single wavelength add-drop multiplexing modules; Described the 1st port that is used for the 2 three port light path selector of cascade is connected to the 2nd port of the 2nd reflective filter of last two-way single wavelength add-drop multiplexing module, described the 2nd port that is used for the 2 three port light path selector of cascade is connected to the 4th port of these shared four port light path selectors, and described the 3rd port that is used for the 2 three port light path selector of cascade is connected to the 1st port of the 2nd reflective filter of back one two-way single wavelength add-drop multiplexing module.
Described each the two-way single wavelength add-drop multiplexing module of this two-way multi-wavelength add-drop multiplexing module further comprises: two wavelength shifters that are used for any wavelength light signal of setting out on a journey is converted to certain wavelength light signal; Wavelength shifter is connected on the 3rd port of the 1 three port light path selector in current two-way single wavelength add-drop multiplexing module and the light signal between the road port; Another wavelength shifter is connected on the 1st port of the 2 three port light path selector in current two-way single wavelength add-drop multiplexing module and the light signal between the road port.
The described wavelength shifter of this two-way multi-wavelength add-drop multiplexing module is made of semiconductor optical amplifier or NOLM.
The described reflective filter of this two-way multi-wavelength add-drop multiplexing module is the tunable fiber Bragg grating that has controller.
The described controller of this two-way multi-wavelength add-drop multiplexing module is temperature controller or stress controller.
The described light path selector of this two-way multi-wavelength add-drop multiplexing module is an optical circulator.
Combine by commonplace components by such scheme a kind of two-way single wavelength add-drop multiplexing module provided by the present invention as can be seen, simple in structure, easy realization, save optical device, improved the utilance of optical device, thereby can effectively reduce the optical transmission system cost.And form the add drop multiplex that two-way multi-wavelength add-drop multiplexing module is realized multiple wavelength optical signal by the cascade of two-way single wavelength add-drop multiplexing module.And add-drop multiplexing module of the present invention further can be made full photokinesis add-drop multiplexing module and road about full photokinesis when not needing O/E/O conversion just can realize in unidirectional or the two-way optical transmission system single ripple or multi-wavelength, thereby the flexibility that has improved system.
Description of drawings
Fig. 1 is a kind of add-drop multiplexing module structural representation of prior art;
Fig. 2 is two-way single wavelength add-drop multiplexing module structural representation of preferred embodiment of the present invention;
Fig. 3 is the two-way multi-wavelength add-drop multiplexing module structural representation of preferred embodiment of the present invention.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Two-way single wavelength add-drop multiplexing module that the present invention proposes at least should be by two four port light path selectors, two three port light path selectors and two reflective filters that are used to reflect certain wavelength light signal, and the two-way full photokinesis add drop multiplex that can realize light signal by the replacement and the increase of device, can also further carry out in addition single wavelength add-drop multiplexing module of the present invention integrated, realize multiple wavelength optical signal about.
Referring to shown in Figure 2, Fig. 2 is the basic structure of two-way single wavelength add-drop multiplexing module of preferred embodiment of the present invention, light path selector adopts optical circulator in the present embodiment, reflective filter adopts tunable optical fiber Bragg grating, this two-way single wavelength add-drop multiplexing module comprises: two four ports light rings 1a, 1b, two three ports light rings 2a, 2b, two tunable optical fiber Bragg grating 3a, 3b, and corresponding controller 4a, 4b, two All Optical Wave Converter 5a, 5b.Wherein, controller 4a, 4b can be temperature controllers, it also can be stress controller, they are separately positioned on two tunable optical fiber Bragg grating 3a, the 3b, can dynamically change the cycle of tunable optical fiber Bragg grating 3a, 3b by their effect, thereby realize the adjustable of optical grating reflection wavelength, and then realize the light signal dynamic adjustable of road wavelength up and down.Two All Optical Wave Converter 5a, 5b can constitute or NOLM formations such as (NLOM) by partly leading device image intensifer (SOA), and any wavelength light signal that is used for setting out on a journey is converted to the specific wavelength light signal.
Referring to the structure of Fig. 2, describe the operation principle of the two-way single wavelength add-drop multiplexing module of the present invention in detail, below three ports and four ports light rings all abbreviate optical circulator as.
The west is to the multiple wavelength optical signal λ of transmission
1, λ
2... λ
i... λ
nBe input to the 1st port of optical circulator 1a from the west to the output port (W-in) of optical-fibre channel, output to tunable optical fiber Bragg grating 3a from the 2nd port of this optical circulator 1 a.Suppose that this punishment inserts out the arbitrary wavelength X in the above-mentioned multiple wavelength optical signal
iLight signal, then can regulate optical fiber Bragg raster 3a by controller 4a, making optical fiber Bragg raster 3a is λ to wavelength
iLight signal reflection, and to the light signal λ of its commplementary wave length
1, λ
2... λ
nBe transmission, finish selection wavelength.The light signal λ of its commplementary wave length
1, λ
2... λ
nAfter tunable optical fiber Bragg grating 3a transmission output, enter into the 4th port of optical circulator 1b, output to the west to optical-fibre channel input port (W-out) from this optical circulator 1b the 1st port again, realized the normal transmission of west to light signal.Wavelength is λ
iLight signal after tunable optical fiber Bragg grating 3a reflection, turn back to the 2nd port of optical circulator 1a, output to the 1st port of optical circulator 2a then from this optical circulator 1a the 3rd port, export by the 2nd port of optical circulator 2a at last, thereby realized that wavelength is λ
iThe following road of light signal.For light signal λ
iSet out on a journey, at first by All Optical Wave Converter 5a with any wavelength X
rLight signal be converted to standard wave length λ
i, the light signal λ after the conversion
iBe input to the 1st port of optical circulator 2b, output to the 3rd port of optical circulator 1b through this optical circulator 2b the 2nd port, export from the 4th port of optical circulator 1b again, after tunable optical fiber Bragg grating 3a reflection, turn back to the 4th port of optical circulator 1b, after this optical circulator 1b the 1st port and western to multipath light signal λ
1, λ
2... λ
nClose ripple and become λ
1, λ
2... λ
i... λ
nLight signal outputs to the input (W-out) of optical-fibre channel, has finished Guang Xinhao ﹠amp; Set out on a journey.
In like manner, arbitrary standard wave length λ of east orientation transmission
i' light signal can adopt and λ
iSimilar fashion realizes about its dynamic all-optical, light signal λ
1', λ
2' ... λ
i' ... λ
n' be input to the 1st port of optical circulator 1b from the output port (E-in) of east orientation optical-fibre channel, output to tunable optical fiber Bragg grating 3b from this optical circulator 1b the 2nd port, suppose that tunable optical fiber Bragg grating 3b is to wavelength X
i' light signal reflection, all the other light signal λ
1', λ
2' ... λ
n' pass tunable optical fiber Bragg grating 3b after the 4th and the 1st port of optical circulator 1a outputs to the input port (E-out) of east orientation optical-fibre channel.Wavelength is λ
i' light signal through tunable optical fiber Bragg grating 3b reflection after the 2nd and the 3rd port of optical circulator 1b, again through the 2nd, the 3rd port output of optical circulator 2b, thereby realize λ
iThe following road of ' light signal.For light signal λ
i' set out on a journey, at first by All Optical Wave Converter 5b with any wavelength X
rLight signal be converted to standard wave length λ
i', the light signal λ after will changing again
i' be input to the 3rd port of optical circulator 2a, the the 3rd, the 4th port through the 1st port of optical circulator 2a and optical circulator 1a arrives tunable optical fiber Bragg grating 3b, after this tunable optical fiber Bragg grating 3b reflection again through the 4th and the 1st port and the east orientation multipath light signal λ of optical circulator 1a
1', λ
2' ... λ
n' close ripple and become λ
1', λ
2' ... λ
i' ... λ
n' light signal, and output to the input (E-out) of optical-fibre channel, so just finished the full photokinesis add drop multiplex of two-way single wavelength light signal.
If the two-way full photokinesis add-drop multiplexing module of a plurality of wavelength light signals about wanting to realize simultaneously, then can between two two-way full photokinesis add-drop multiplexing modules, adopt two 3 port photocirculators with the full photokinesis add-drop multiplexing module of the two-way single wavelength cascade among Fig. 2, referring to shown in Figure 3.By that analogy, if adopt 2n-2 optical circulator, can realize 2n, i.e. the add drop multiplex of each direction n two-way full photokinesis of wavelength with the module cascade shown in Figure 1 of n level.
Be cascaded as example with two two-way full photokinesis add-drop multiplexing modules below and be elaborated, referring to shown in Figure 3.Fig. 3 provided by two 3 ports light rings 6b, 6c cascade form a direction can be simultaneously the composition schematic diagram of the two-way full photokinesis add-drop multiplexing module of two wavelength up and down.The west is to the multiple wavelength optical signal λ of transmission
1, λ
2... λ
j... λ
i... λ
nBe input to the 1st port of optical circulator 1a from the west to the output port (W-in) of optical-fibre channel, output to tunable optical fiber Bragg grating 3a from this optical circulator 1 a the 2nd port.Suppose that this punishment inserts out the arbitrary wavelength X in the above-mentioned multiple wavelength optical signal
iLight signal, then can regulate tunable optical fiber Bragg grating 3a by controller 4a, making this tunable optical fiber Bragg grating 3a is λ to wavelength
iLight signal reflection, and to the light signal λ of its commplementary wave length
1, λ
2... λ
j... λ
nThe selection to wavelength is finished in transmission.The light signal λ of its commplementary wave length
1, λ
2... λ
j... λ
nAfter tunable optical fiber Bragg grating 3a output, enter into the 1st port of optical circulator 6b, output to tunable optical fiber Bragg grating 3c from this optical circulator 6b the 2nd port again, suppose that tunable optical fiber Bragg grating 3c is λ to wavelength
jLight signal reflection, the light signal λ of its commplementary wave length then
1, λ
2... λ
nSee through the 4th port that tunable optical fiber Bragg grating 3c enters optical circulator 1b, output to the west to optical-fibre channel input port (W-out) from this optical circulator 1b the 1st port again, realized the normal transmission of west to light signal.Wavelength is λ
iLight signal after tunable optical fiber Bragg grating 3a reflection, turn back to the 2nd port of optical circulator 1a, output to the 1st port of optical circulator 2a then from this optical circulator 1a the 3rd port, export by the 2nd port of optical circulator 2a at last, thereby realized that wavelength is λ
iThe following road of light signal.Wavelength is λ
jLight signal after tunable optical fiber Bragg grating 3c reflection, turn back to the 2nd port of optical circulator 6b, output to the 2nd port of optical circulator 6a then from this optical circulator 6b the 3rd port, output to the 1st port of optical circulator 2c again from this optical circulator 6a the 3rd port, export by the 2nd port of optical circulator 2c at last, thereby realized that wavelength is λ
jThe following road of light signal.
For light signal λ
iSet out on a journey, at first by All Optical Wave Converter 5a with any wavelength X
rLight signal be converted to standard wave length λ
i, the light signal λ after the conversion
iBe input to the 1st port of optical circulator 2b, output to the 1st port of optical circulator 6a through this optical circulator 2b the 2nd port, export from the 2nd port of optical circulator 6a again, enter into the 3rd port of optical circulator 6b, arrive tunable fiber Bragg grating 3a from the output of this optical circulator 6b the 1st port again, after tunable optical fiber Bragg grating 3a reflection, turn back to the 1st port of optical circulator 6b, arrive tunable fiber Bragg grating 3c through the output of this optical circulator 6b the 2nd port again, because tunable optical fiber Bragg grating 3c is λ to wavelength only
jFlashlight reflection, so flashlight λ
iCan see through the 4th port that tunable optical fiber Bragg grating 3c enters optical circulator 1b, after this optical circulator 1b the 1st port closes ripple with the west to multipath light signal.
For light signal λ
jSet out on a journey, at first by All Optical Wave Converter 5c with any wavelength X
rLight signal be converted to standard wave length λ
j, the light signal λ after the conversion
jBe input to the 1st port of optical circulator 2d, output to the 3rd port of optical circulator 1b through this optical circulator 2d the 2nd port, the 4th port output from optical circulator 1b arrives tunable fiber Bragg grating 3c again, after tunable optical fiber Bragg grating 3a reflection, turn back to the 4th port of optical circulator 1b, after this optical circulator 1b the 1st port closes ripple with the west to multipath light signal.
Two light signal λ of Cha Ruing like this, at last
i, λ
jCross the west of two tunable optical fiber Bragg gratings to multipath light signal λ with transmission
1, λ
2... λ
nBecome λ after closing ripple
1, λ
2... λ
j... λ
i... λ
nLight signal outputs to the input (W-out) of optical-fibre channel.
For the add drop multiplex of East Road light signal and all fours at West Road, the situation of the two-way full photokinesis add drop multiplex of n wavelength can push away according to two wavelength among Fig. 3 two-way full photokinesis add drop multiplex fully, just repeats no more here.
The two-way add-drop multiplexing module of the present invention adopts commonplace components commonly used to constitute, and is simple in structure, technology maturation, and can cascade realize the multiple wavelength optical signal add drop multiplex, and saved optical device, improved the utilance of optical device, can effectively reduce the optical transmission system cost.Make by this two-way add-drop multiplexing module, two-way full photokinesis OADM module is different from traditional static OADM, when not needing O/E/O conversion just can realize in unidirectional or the two-way optical transmission system single ripple or multi-wavelength about the full photokinesis, can be applied in the DWDM optical transmission system of single fiber bi-directional, especially in the full light metropolitan area network in future, more wide application prospect should be arranged.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. two-way single wavelength add-drop multiplexing module, be arranged in optical-fibre channel, it is characterized in that comprising at least: the 1 four port light path selector, the 2 four port light path selector, the 1 three port light path selector, the 2 three port light path selector, be used to reflect the 1st reflective filter and the 2nd reflective filter of certain wavelength light signal;
The 1st port of described the 1 four port light path selector is connected to an I/O end of optical-fibre channel, the 2nd of the 1 four port light path selector, the 4th port connects the 1st port of described the 1st reflective filter and the 2nd reflective filter respectively, the 2nd port of the 1st reflective filter and the 2nd reflective filter is connected to the 4th of the 2 four port light path selector respectively, the 2nd port, the 1st port of the 2 four port light path selector is connected to another I/O end of optical-fibre channel, the 3rd port of described the 1 four port light path selector connects the 1st port of described the 1 three port light path selector, the 2nd port of the 1 three port light path selector is a road port under the light signal, the 3rd port of the 1 three port light path selector is a road port on the light signal, the 3rd port of described the 2 four port light path selector connects the 2nd port of described the 2 three port light path selector, the 1st port of the 2 three port light path selector is a road port on the light signal, and the 3rd port of the 2 three port light path selector is a road port under the light signal.
2. according to the described add-drop multiplexing module of claim 1, it is characterized in that further comprising: two wavelength shifters that are used for any wavelength light signal of setting out on a journey is converted to certain wavelength light signal, wavelength shifter is connected on the 3rd port of described the 1 three port light path selector and the light signal between the road port, and another wavelength shifter is connected on the 1st port of described the 2 three port light path selector and the light signal between the road port.
3. add-drop multiplexing module according to claim 2 is characterized in that: described wavelength shifter is made of semiconductor optical amplifier or NOLM.
4. add-drop multiplexing module according to claim 1 is characterized in that: described reflective filter is the tunable fiber Bragg grating that has controller.
5. add-drop multiplexing module according to claim 4 is characterized in that: described controller is temperature controller or stress controller.
6. add-drop multiplexing module according to claim 1 is characterized in that: described light path selector is an optical circulator.
7. two-way multi-wavelength add-drop multiplexing module, it is characterized in that comprising: two or more are used for the described two-way single wavelength add-drop multiplexing module of three port light path selectors, two or more claims 1 of cascade; Per two two-way single wavelength add-drop multiplexing modules carry out cascade by the 1 three port light path selector and the 2 three port light path selector that is used for cascade;
All two-way single wavelength add-drop multiplexing modules are cascaded, shared one the four port light path selector of former and later two two-way single wavelength add-drop multiplexing modules, the 1st port of these shared four port light path selectors is connected to the 2nd port of the 2 three port light path selector of last two-way single wavelength add-drop multiplexing module, the 3rd port of these shared four port light path selectors is connected to the 1st port of the 1 three port light path selector of back one two-way single wavelength add-drop multiplexing module, is connected with described the 1 three a port light path selector that is used for cascade between the 2nd port of these shared four port light path selectors and the 1st reflective filter of former and later two two-way single wavelength add-drop multiplexing modules; Described the 1st port that is used for the 1 three port light path selector of cascade is connected to the 2nd port of the 1st reflective filter of last two-way single wavelength add-drop multiplexing module, described the 2nd port that is used for the 1 three port light path selector of cascade is connected to the 1st port of the 1st reflective filter of back one two-way single wavelength add-drop multiplexing module, and described the 3rd port that is used for the 1 three port light path selector of cascade is connected with the 2nd port of these shared four port light path selectors; Be connected with the 2 three port light path selector that is used for cascade between the 4th port of these shared four port light path selectors and the 2nd reflective filter of former and later two two-way single wavelength add-drop multiplexing modules; Described the 1st port that is used for the 2 three port light path selector of cascade is connected to the 2nd port of the 2nd reflective filter of last two-way single wavelength add-drop multiplexing module, described the 2nd port that is used for the 2 three port light path selector of cascade is connected to the 4th port of these shared four port light path selectors, and described the 3rd port that is used for the 2 three port light path selector of cascade is connected to the 1st port of the 2nd reflective filter of back one two-way single wavelength add-drop multiplexing module.
8. according to the described add-drop multiplexing module of claim 7, it is characterized in that described each two-way single wavelength add-drop multiplexing module further comprises: two wavelength shifters that are used for any wavelength light signal of setting out on a journey is converted to certain wavelength light signal; Wavelength shifter is connected on the 3rd port of the 1 three port light path selector in current two-way single wavelength add-drop multiplexing module and the light signal between the road port; Another wavelength shifter is connected on the 1st port of the 2 three port light path selector in current two-way single wavelength add-drop multiplexing module and the light signal between the road port.
9. add-drop multiplexing module according to claim 8 is characterized in that: described wavelength shifter is made of semiconductor optical amplifier or NOLM.
10. add-drop multiplexing module according to claim 7 is characterized in that: described reflective filter is the tunable fiber Bragg grating that has controller.
11. add-drop multiplexing module according to claim 10 is characterized in that: described controller is temperature controller or stress controller.
12. add-drop multiplexing module according to claim 7 is characterized in that: described light path selector is an optical circulator.
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| CN1870469B (en) * | 2006-05-29 | 2010-06-09 | 浙江工业大学 | Optical split insertion duplexer based on acousto-optic tunable wave filter |
| CN1870470B (en) * | 2006-05-29 | 2010-06-16 | 浙江工业大学 | Two-fibre two-way multi-section shared protection optical fiber ring network |
| CN101136717B (en) * | 2006-08-28 | 2011-05-11 | 中兴通讯股份有限公司 | Configurable OADM device of implementing single, polydirectional wavelength scheduling |
| US8452180B2 (en) * | 2009-05-05 | 2013-05-28 | Peiliang GAO | Optical multiplexer |
| CN104166291B (en) * | 2013-05-16 | 2017-07-21 | 华为技术有限公司 | A kind of optical signal add-drop multiplexer and optical signal processing method |
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| CN1316844A (en) * | 2001-06-01 | 2001-10-10 | 清华大学 | Optical split and multiplexer module for dual-fibre bidirectional loop network |
| CN1316659A (en) * | 2001-06-01 | 2001-10-10 | 清华大学 | Single-fibre bidirectional optical split and complexer module |
| WO2002052317A1 (en) * | 2000-12-22 | 2002-07-04 | Seneca Networks, Inc. | Bidirectional wdm optical communication system with bidirectional optical service channels |
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| WO2002052317A1 (en) * | 2000-12-22 | 2002-07-04 | Seneca Networks, Inc. | Bidirectional wdm optical communication system with bidirectional optical service channels |
| CN1316844A (en) * | 2001-06-01 | 2001-10-10 | 清华大学 | Optical split and multiplexer module for dual-fibre bidirectional loop network |
| CN1316659A (en) * | 2001-06-01 | 2001-10-10 | 清华大学 | Single-fibre bidirectional optical split and complexer module |
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| CN1533080A (en) | 2004-09-29 |
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