CN101599809A - Realize the device of channel level compensating adaptive dispersion on a kind of main optical path - Google Patents
Realize the device of channel level compensating adaptive dispersion on a kind of main optical path Download PDFInfo
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- CN101599809A CN101599809A CNA2008100678033A CN200810067803A CN101599809A CN 101599809 A CN101599809 A CN 101599809A CN A2008100678033 A CNA2008100678033 A CN A2008100678033A CN 200810067803 A CN200810067803 A CN 200810067803A CN 101599809 A CN101599809 A CN 101599809A
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Abstract
The present invention discloses the device of realizing the channel level compensating adaptive dispersion on a kind of main optical path, comprising: passage de-interleaving multiplexer, channel level Tunable Dispersion Compensator, Wave decomposing multiplexer and optical receiver.Its characteristics are, behind the main optical path signal input channel de-interleaving multiplexer, are divided into odd chanel signal and even-numbered channels signal, carry out dispersion compensation respectively.In this way, solve the difficult problem of dispersion compensator bandwidth deficiency, satisfied the demand of dispersion compensation bandwidth and chromatic dispersion adjustment amount.Simultaneously, reduce the cost of wavelength-division system, increased the wavelength-division system capacity, improved the transmission performance of wavelength-division system.
Description
Technical field
The present invention relates to optical communication field, relate in particular to a kind of channel level self-adapting dispersion compensator of wavelength-division multiplex system.
Background technology
ITU-T suggestion G.667, " Characteristics of adaptive chromaticdispersion compensators " provides the method for compensating adaptive dispersion.The single channel compensating adaptive dispersion (Fig. 1) and the multi-channel adaptive dispersion compensation (Fig. 2) that comprise wavelength-division system.Most of commercial wavelength-division system all adopts the implementation of Fig. 1 at present, Tunable Dispersion Compensator of each optical receiver configuration; Though dispersion compensator can carry out the multichannel compensation, the dispersion compensation adjustment technology prematurity still of channel level, the scheme of Fig. 2 seldom adopts.
The breadboard Kenya Suzuki of Japan's NTT photon has reported a kind of multichannel channel level Tunable Dispersion Compensator recently, (Fig. 3, see " Channel-by-Channel TunableOptical Dispersion Compensator Consisting ofArrayed-Waveguide Grating and Liquid Crystal on Silicon ", OFC2008OWP4), utilize AWG (arrayed-waveguide grating, array waveguide grating) and LCOS (liquid crystal on silicon, liquid crystal on silicon) technology has realized the channel level adjustable dispersion compensating.Can predict, along with the development and the maturation of channel level adjustable dispersion compensating technology, the compensating adaptive dispersion of following main optical path upper channel level will become the main flow implementation of 40Gb/s and higher rate wavelength-division system.
But the same with existing most of dispersion compensation technology, the relation that there are mutual restriction in the dispersion compensation bandwidth of channel level Tunable Dispersion Compensator and chromatic dispersion compensation quantity: when chromatic dispersion compensation quantity was big, the dispersion compensation bandwidth was less; Chromatic dispersion compensation quantity hour, the dispersion compensation bandwidth is bigger.80 * 40Gb/s wavelength-division system with China is an example, channel spacing is 50GHz, signal bandwidth is approximately 50GHz, but the channel spacing of the multichannel dispersion compensation of existing dispersion bandwidth 50GHz is 100GHz or 200GHz, cause like this dispersion compensator simultaneously compensation channels be spaced apart the multi channel signals of 50GHz.
Summary of the invention
The objective of the invention is to, on main optical path, realize compensating adaptive dispersion, and each passage all can finish self adaptation and adjust chromatic dispersion compensation quantity, make the dispersion compensation of each passage can satisfy the designing requirement of system dispersion bandwidth and dispersion measure.
The present invention by the following technical solutions, the device of realizing the channel level compensating adaptive dispersion on the main optical path of the present invention comprises with lower module: passage de-interleaving multiplexer (Interleaver) 11, channel level Tunable Dispersion Compensator (M-LADC, Multichannel Line AdaptiveDispersion Compensator), Wave decomposing multiplexer (DEMUX) and optical receiver (Rx), wherein the channel level Tunable Dispersion Compensator divides odd chanel level dispersion-tunable compensator 21 and even-numbered channels level dispersion-tunable compensator 22, Wave decomposing multiplexer divides odd chanel Wave decomposing multiplexer 31 and even-numbered channels Wave decomposing multiplexer 32, and optical receiver divides odd number optical receiver 41 and even number optical receiver 42.
Behind main optical path signal input channel de-interleaving multiplexer 11, be divided into odd chanel signal and even-numbered channels signal, the odd chanel signal enters odd chanel level dispersion-tunable compensator 21, the even-numbered channels signal enters even-numbered channels level dispersion-tunable compensator 22, enter odd chanel Wave decomposing multiplexer 31 and even-numbered channels Wave decomposing multiplexer 32 subsequently respectively, enter corresponding optical receiver 41 and 42 behind the demultiplexing respectively, optical receiver 41 and 42 is with error code information, for example error code information before the FEC error correction feeds back to corresponding channel level dispersion- tunable compensator 21 and 22 respectively.The error code information of each passage is used to refer to the chromatic dispersion that pathway level dispersion-tunable compensator is adjusted respective channel, shown in Fig. 4 dotted line.
Further, the present invention also can comprise composite wave appts, described Wave decomposing multiplexer 31 and 32 is merged into Wave decomposing multiplexer 52, after odd chanel signal and even-numbered channels signal pass through channel level dispersion- tunable compensator 21 and 22 respectively, reconfiguring through composite wave appts is one road light signal, outputs to Wave decomposing multiplexer 52.Enter corresponding optical receiver 41 and 42 behind the demultiplexing respectively, optical receiver 41 and 42 feeds back to corresponding passage dispersion- tunable compensator 21 and 22 respectively with error code information.
Further, composite wave appts of the present invention is 2:1 multiplexer (MUX) 51 or 3dB power coupler.2:1MUX51 or 3dB power coupler are finished the multiplexing of odd chanel signal and even-numbered channels signal.
In addition, according to the system power budgetary request, can in position dispose image intensifer.
Compared with prior art, the present invention has utilized passage de-interleaving multiplexer that main optical path is divided into odd chanel dexterously and even-numbered channels is carried out compensating adaptive dispersion, solve the difficult problem of dispersion compensator bandwidth deficiency, satisfied the demand of dispersion compensation bandwidth and chromatic dispersion adjustment amount.Simultaneously, reduce the cost of wavelength-division system, increased the wavelength-division system capacity, improved the transmission performance of wavelength-division system.
Description of drawings
Fig. 1 is the theory diagram of wavelength-division system single channel compensating adaptive dispersion among the ITU-TG.667
Fig. 2 is the G.667 theory diagram of middle wavelength-division system multi-channel adaptive dispersion compensation of ITU-T
Fig. 3 is the multichannel Tunable Dispersion Compensator of OFC2008 report
Fig. 4 is an implementation 1 of realizing the channel level compensating adaptive dispersion on the main optical path of the present invention
Fig. 5 is an implementation 2 of realizing the channel level compensating adaptive dispersion on the main optical path of the present invention
Embodiment
Embodiment one: the channel level self-adapting dispersion compensator on a kind of wavelength-division system of 50GHz channel spacing
Passage de-interleaving multiplexer adopts 50～100GHz, promptly imports 50GHz channel spacing wavelength, demultiplexes into the odd chanel signal and the even-numbered channels signal of 2 road 100GHz channel spacings.Each dispersion compensator can be finished the multichannel dispersion compensation of 100GHz channel spacing, and dispersion bandwidth and maximum dispersion measure meet the requirements, and the dispersion-tunable of each passage.Odd chanel level dispersion-tunable compensator 21 is finished the compensating adaptive dispersion of odd chanel signal, even-numbered channels level dispersion-tunable compensator 22 is finished the compensating adaptive dispersion of even-numbered channels signal, the Wave decomposing multiplexer 31 and 32 that enters corresponding 100GHz channel spacing is subsequently respectively finished the output of multiple signals, enter optical receiver 41 and 42 at last respectively, optical receiver 41 and 42 is given corresponding passage dispersion- tunable compensator 21 and 22 with the error code feedback information respectively.According to the system power budgetary request, can in position dispose image intensifer.
Embodiment two: the channel level self-adapting dispersion compensator on a kind of wavelength-division system of 100GHz channel spacing
Passage de-interleaving multiplexer adopts 100～200GHz, promptly imports 100GHz channel spacing wavelength, demultiplexes into the odd chanel signal and the even-numbered channels signal of 2 road 200GHz channel spacings.Each Tunable Dispersion Compensator can be finished the multichannel dispersion compensation of 200GHz channel spacing, and dispersion bandwidth and maximum dispersion measure meet the requirements, and the dispersion-tunable of each passage.Odd chanel level dispersion-tunable compensator 21 is finished the compensating adaptive dispersion of odd chanel signal, and even-numbered channels level dispersion-tunable compensator 22 is finished the compensating adaptive dispersion of even-numbered channels signal.Utilize the 2:1MUX51 of 100～200GHz subsequently, perhaps the 3dB power coupler is multiplexed into 1 road light signal again with odd chanel signal and even-numbered channels signal, the Wave decomposing multiplexer 52 that enters the 100GHz channel spacing is again finished the output of multiple signals, and last odd chanel signal and even-numbered channels signal enter corresponding optical receiver 41 and 42 respectively. Optical receiver 41 and 42 is given corresponding passage dispersion- tunable compensator 21 and 22 with the error code feedback information respectively.According to the system power budgetary request, can in position dispose image intensifer.
Claims (6)
1. realize the device of channel level compensating adaptive dispersion on the main optical path, it is characterized in that, comprise with lower module: passage de-interleaving multiplexer (11), the channel level Tunable Dispersion Compensator, Wave decomposing multiplexer and optical receiver, wherein said channel level Tunable Dispersion Compensator is divided into odd chanel level dispersion-tunable compensator (21) and even-numbered channels level dispersion-tunable compensator (22), described Wave decomposing multiplexer is divided into odd chanel Wave decomposing multiplexer (31) and even-numbered channels Wave decomposing multiplexer (32), and described optical receiver is divided into odd chanel optical receiver (41) and even-numbered channels optical receiver (42);
Behind the main optical path signal input channel de-interleaving multiplexer (11), be divided into odd chanel signal and even-numbered channels signal, the odd chanel signal enters odd chanel level dispersion-tunable compensator (21), the even-numbered channels signal enters even-numbered channels level dispersion-tunable compensator (22), enter odd chanel Wave decomposing multiplexer (31) and even-numbered channels Wave decomposing multiplexer (32) subsequently respectively, enter corresponding optical receiver (41 and 42) behind the demultiplexing respectively, described optical receiver (41 and 42) feeds back to corresponding described channel level dispersion-tunable compensator (21 and 22) respectively with error code information.
2. realize the device of channel level compensating adaptive dispersion on the main optical path according to claim 1, it is characterized in that, also comprise composite wave appts, described Wave decomposing multiplexer (31 and 32) is merged into Wave decomposing multiplexer (52), after odd chanel signal and even-numbered channels signal pass through described channel level dispersion-tunable compensator (21 and 22) respectively, reconfiguring through described composite wave appts is one road light signal, output to described Wave decomposing multiplexer (52), enter corresponding optical receiver (41 and 42) behind the demultiplexing respectively, described optical receiver (41 and 42) feeds back to corresponding described channel level dispersion-tunable compensator (21 and 22) respectively with error code information.
3. realize the device of channel level compensating adaptive dispersion on the main optical path according to claim 2, it is characterized in that described composite wave appts is 2: 1 multiplexers (51) or 3dB power coupler.
4. realize the device of channel level compensating adaptive dispersion on the main optical path according to claim 1, it is characterized in that, described passage de-interleaving multiplexer (11) adopts 50～100GHz, described channel level dispersion-tunable compensator (21 and 22) meets the multichannel dispersion compensation requirement of 100GHz channel spacing, and described Wave decomposing multiplexer (31 and 32) satisfies the demultiplexing requirement of 100GHz channel spacing.
5. realize the device of channel level compensating adaptive dispersion on the main optical path according to claim 3, it is characterized in that, described passage de-interleaving multiplexer (11) adopts 100～200GHz, described channel level dispersion-tunable compensator (21 and 22) meets the multichannel dispersion compensation requirement of 200GHz channel spacing, described 2: 1 multiplexer (51) be 100～200GHz, described Wave decomposing multiplexer (52) satisfies the demultiplexing requirement of 100GHz channel spacing.
6. according to the device of realizing the channel level compensating adaptive dispersion on the described main optical path of arbitrary claim in the claim 1～5, it is characterized in that, also comprise the image intensifer that disposes according to the system power budgetary request more than.
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| CN2008100678033A CN101599809B (en) | 2008-06-03 | 2008-06-03 | Device for realizing channel self-adaptive dispersion compensation on main optical channel |
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| CN2008100678033A CN101599809B (en) | 2008-06-03 | 2008-06-03 | Device for realizing channel self-adaptive dispersion compensation on main optical channel |
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| US20030039013A1 (en) * | 2001-08-27 | 2003-02-27 | Jones David J. | Dynamic dispersion compensation in high-speed optical transmission systems |
| US8798483B2 (en) * | 2005-12-20 | 2014-08-05 | Zte Corporation | Apparatus and method for selfadapting dispersion compensation |
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