CN1320790C - Broad band dispersion compensation method and fibre-optical communication system using the method - Google Patents
Broad band dispersion compensation method and fibre-optical communication system using the method Download PDFInfo
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- CN1320790C CN1320790C CNB2004100061054A CN200410006105A CN1320790C CN 1320790 C CN1320790 C CN 1320790C CN B2004100061054 A CNB2004100061054 A CN B2004100061054A CN 200410006105 A CN200410006105 A CN 200410006105A CN 1320790 C CN1320790 C CN 1320790C
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Abstract
The present invention relates to a broadband dispersion compensation method which is combined with broadband optical amplification and an optical communication system of the method. The present invention is especially adapted to extra long distance circuits (ULH, Ultra Long Haul). The present invention adopts broadband dispersion compensation fibers to compensate the dispersion, and combines the insertion loss which is produced by that a broadband Raman distributing optical amplifier compensates the dispersion. The present invention can realizes the broadband optical communication system with simple structure, high efficiency and low cost.
Description
Technical field
The present invention relates to a kind of optical fiber telecommunications system, more particularly, relate to a kind of dense wave division multipurpose that adopts the broadband chromatic dispersion compensation method (DWDM, Dense Wavelength Division Multiplexing) optical fiber telecommunications system.
Background technology
The data service that along with telecommunication service especially with IP is representative presents explosive growth, and people grow with each passing day to the demand of telecommunication transmission capacity, and at present, it is long apart from optical signal transmission to adopt dense wave division multipurpose (DWDM) technology to realize usually.In fact wavelength division multiplexing (WDM) technology is exactly a kind of multi channel optical transport technology, and promptly the light of each different wave length is also referred to as radio frequency channel, all is the channel of a carrying specific bit rate, then they is multiplexed into one road light signal and transmits in simple optical fiber.During reception, utilize optical branching filter spare that each radio frequency channel is carried out demultiplexing, receive processing then respectively.Decay for compensated fiber and other optical devices utilizes Optical Amplification Technology that each radio frequency channel is amplified simultaneously usually in the circuit.Therefore, in fact general wavelength-division multiplex system just is based on the multi-channel optical communication system of Optical Amplification Technology.
(wavelength is that 1530nm～1565nm) application is very ripe to traditional C-band.Along with the demand of big volume transport, (wavelength is that 1570nm～1605nm) has also dropped into commercial the application to L-band.Because the principle of erbium-doped fiber amplifier (EDFA) and the restriction of realization mechanism, its amplification range still is limited in each wave band.For example, in the C+L broadband, EDFA remains and is divided into C-band amplifier and L-band amplifier, is the mode that adopts first subrane to amplify again in C+L wave band wdm system.In other broadband dwdm system, the EDFA that is adopted also is the amplifier of subrane.
High Capacity Communication System requires the high channel capacity, and therefore the transmission rate of every radio frequency channel is also very high.When the speed of single channel among the DWDM reach 10Gb/s and more than, chromatic dispersion is to the highly significant that influences of signal transmission, transmission range is long more, influences big more.Therefore, must carry out dispersion compensation, adopt the mode that in communication system, increases dispersion compensator usually system.
The operation window of the EDFA that dwdm system uses in order to utilize EDFA, must be researched and solved chromatic dispersion problem at 1550nm.In order to reduce the influence of optical fiber dispersion, single frequency laser commonly used and non-zero dispersion fiber (G.655).But when high-speed transfer, because of optical source wavelength is warbled, through Optical Fiber Transmission, the light pulse distortion is serious, therefore adopts the optical fiber dispersion compensation technology.Adopt dispersive optical fiber to make the technology comparative maturity of Passive dispersion compenstator (PDC, Passive Disperse Compensator) at present, dropped into commercial the application.Utilizing the maximum characteristics of dispersive optical fiber compensation is to realize that broadband chromatic dispersion compensation and 1st order chromatic dispersion, 2nd order chromatic dispersion compensate entirely.Other dispersion compensation method, fiber grating etc. for example is not suitable for the dispersion compensation in broadband.
But,, therefore adopt EDFA to remedy traditionally to inserting loss because Passive dispersion compenstator can bring the insertion loss to system.And adopt traditional EDFA to compensate to inserting loss, and must amplify by subrane, all must be first subrane, amplify again and then close ripple with being connected of transmission line and FPDC.On the other hand, adopt the EDFA mode, if compensation FPDC loss earlier, compensated fiber line loss again, need to adopt twice first subrane, after close ripple mode, so just can not embody the benefit of broadband chromatic dispersion compensation; If use EDFA again after FPDC is placed on fibre circuit, then the power budget of optical link reduces, and is equivalent to reduce the circuit span, is not suitable for practice.
Therefore, need a kind ofly broadband compensation and broadband to be amplified the additional technology of the chromatic dispersion that combines, so as to constitute simple in structure, efficiently, optical communication system cheaply.
Summary of the invention
Purpose of the present invention just provides a kind of broadband chromatic dispersion compensation method and system in conjunction with the broadband light amplification, is particularly suitable for going up use at extra long distance circuit (ULH, Ultra Long Haul).Basic principle of the present invention is as follows: when adopting broadband chromatic dispersion compensation optical fiber that chromatic dispersion is compensated, in conjunction with adopting Broad-band Raman distribute light amplifier to remedy the insertion loss that dispersion compensation produces, like this can implementation structure simply, efficiently, broadband optical communication system cheaply.Utilize the low noise amplification characteristic of Broad-band Raman distribute light amplifier, can significantly improve Optical Signal To Noise Ratio (OSNR).In the dwdm system of routine,, need to improve the launched power of light signal sometimes in order to guarantee certain Optical Signal To Noise Ratio.But, though improve the launched power of light signal signal to noise ratio is improved, often make system's generation error code; Otherwise, suitably reduce launched power, though may cause OSNR to reduce, can realize not having the error code transmission simultaneously.Reason is, causes in the transmission spontaneous radiation (ASE) noise that the factor of error code brings except image intensifer, also comprises the pulse distortion that nonlinear fiber causes.Launched power is high more, and nonlinear effect is serious more.Therefore, preferably manage to make launched power under very low situation, still can keep high Optical Signal To Noise Ratio.The utilization of Raman light amplifier be that distribution Raman amplifies, just in time can satisfy such requirement.Brought high OSNR design margin because distribution Raman amplifies, utilized this surplus,, can overcome the adverse effect that nonlinear effect is brought indirectly, thereby realized the extra long distance optical signal transmission by reducing the launched power of signal.To the broadband for example the insertion loss of the dispersion compensator of C+L wave band compensate, if adopt the image intensifer in broadband, for example above-mentioned Broad-band Raman fiber amplifier can directly link with optical fiber transmission line and FPDC, does not need subrane.
A kind of optical fiber telecommunications system that adopts broadband chromatic dispersion compensation of the present invention comprises inchoation equipment, trunking, receiving end equipment, wherein
Inchoation equipment consists of: a plurality of wave band wave multiplexers synthesize a wave band optical signal with a plurality of radio frequency channel light signals on each wave band; Close the wave band module, will synthesize a broadband optical signal from a plurality of wave band optical signals of a plurality of wave band wave multiplexers; The Raman light amplifier after closing the broadband optical signal amplification of wave band module output, outputs on the circuit optical fiber;
Trunking consists of: the Raman light amplifier is used for the insertion loss of compensation of dispersion compensator module; The dispersion compensator module is used for the chromatic dispersion on the compensated line optical fiber; The Raman light amplifier outputs to the amplification of the light signal behind the dispersion compensation on next section circuit optical fiber;
Receiving end equipment consists of: the Raman light amplifier is used for the insertion loss of compensation of dispersion compensator module; The dispersion compensator module is used for the chromatic dispersion on the compensated line optical fiber; The subrane module is used for the broadband optical signal after the compensation is divided into a plurality of wave bands; A plurality of erbium-doped fiber amplifiers amplify each wave band optical signal from the subrane module respectively; A plurality of wave band channel-splitting filters are divided into a plurality of radio frequency channel light signals with each wave band optical signal.
The another kind of optical fiber telecommunications system that adopts broadband chromatic dispersion compensation of the present invention comprises inchoation equipment, trunking, receiving end equipment, wherein:
Inchoation equipment consists of: a plurality of wave band wave multiplexers synthesize a wave band optical signal with a plurality of radio frequency channel light signals on each wave band; A plurality of erbium-doped fiber amplifiers amplify the wave band optical signal of each wave band wave multiplexer output respectively; Close the wave band module, will synthesize a broadband optical signal, output on the circuit optical fiber from a plurality of wave band optical signals of a plurality of wave band wave multiplexers;
Trunking consists of: the Raman light amplifier is used for the insertion loss of compensation of dispersion compensator module; The dispersion compensator module is used for the chromatic dispersion on the compensated line optical fiber; The subrane module is used for the broadband optical signal behind the dispersion compensation is divided into a plurality of wave band optical signals; A plurality of erbium-doped fiber amplifiers are used for amplifying respectively each wave band optical signal; Close the wave band module, be used for a plurality of wave band optical signals after amplifying are respectively synthesized a broadband optical signal, and output on next section circuit optical fiber;
Receiving end equipment consists of: the Raman light amplifier is used for the insertion loss of compensation of dispersion compensator module; The dispersion compensator module is used for the chromatic dispersion on the compensated line optical fiber; The subrane module is used for the broadband optical signal after the compensation is divided into a plurality of wave bands; A plurality of erbium-doped fiber amplifiers amplify each wave band optical signal from the subrane module respectively; A plurality of wave band channel-splitting filters are divided into a plurality of radio frequency channel light signals with each wave band optical signal.
In above-mentioned two kinds of systems, described dispersion compensator module is used broadband chromatic dispersion compensation optical fiber, and the quantity of described trunking can suitably be selected according to the total distance of system transmissions, and whole system can comprise more than one trunking.
A kind of broadband chromatic dispersion compensation method that is used for optical fiber telecommunications system of the present invention comprises the following steps
In process of transmitting: a plurality of radio frequency channel light signals on each wave band are synthesized each wave band optical signal; A plurality of wave band optical signals are synthesized a broadband optical signal; After the broadband optical signal amplification, output on the circuit optical fiber;
In relay processes: the insertion loss of compensation of dispersion compensator module; Chromatic dispersion on the compensated line optical fiber; The amplification of light signal behind the dispersion compensation is outputed on next section circuit optical fiber;
In receiving course: the insertion loss of compensation of dispersion compensator; Chromatic dispersion on the compensated line optical fiber; Broadband optical signal after the compensation is divided into a plurality of wave bands; Amplify each wave band optical signal respectively; Each wave band optical signal is divided into a plurality of radio frequency channel light signals.
Another kind of the present invention is used for the broadband chromatic dispersion compensation method of optical fiber telecommunications system, comprises the following steps:
In process of transmitting: a plurality of radio frequency channel light signals on each wave band are synthesized each wave band optical signal; Amplify each wave band optical signal respectively; A plurality of wave band optical signals are synthesized a broadband optical signal, output on the circuit optical fiber;
In relay processes: the insertion loss of compensation of dispersion compensator module; Chromatic dispersion on the compensated line optical fiber; Broadband optical signal behind the dispersion compensation is divided into a plurality of wave band optical signals; Amplify each wave band optical signal respectively; A plurality of wave band optical signals after amplifying are respectively synthesized broadband optical signal, and output on next section circuit optical fiber;
In receiving course: the insertion loss of compensation of dispersion compensator module; Chromatic dispersion on the compensated line optical fiber; Broadband optical signal after the compensation is divided into a plurality of wave bands; Amplify each wave band optical signal respectively; Each wave band optical signal is divided into a plurality of radio frequency channel light signals.
Adopt broadband chromatic dispersion compensation method and system of the present invention, realized on broadband (as the C+L wave band), carrying out simultaneously the total dispersion compensation, and be used in combination wide-band optical amplifier, making system cost carry out dispersion compensation than subrane greatly reduces, be jumbo broadband dwdm system, particularly its extra long distance circuit (ULH) is used provides advantageous conditions.
Description of drawings
Fig. 1 is the broadband chromatic dispersion compensation optical fiber that adopted the C+L wave band residual dispersion curve synoptic diagram after chromatic dispersion compensates to transmission line fiber;
Fig. 2 is broadband chromatic dispersion compensation method of the present invention and the optical communication system embodiment that adopts this method;
Fig. 3 is broadband chromatic dispersion compensation method of the present invention and another embodiment of optical communication system that adopts this method.
Embodiment
Explain the specific embodiment of the present invention in detail below in conjunction with accompanying drawing.
System of the present invention uses optical fiber passive dispersion compensator (FPDC) particularly, is also referred to as dispersion compensating fiber (DCF, Disperse Compensate Fiber) and carries out broadband chromatic dispersion compensation.Nature adds these Passive dispersion compenstator spares, brings extra insertion loss can for whole optical fiber telecommunications system; For this reason, system of the present invention uses the Raman light amplifier in broadband, and the insertion loss that dispersion compensation device is produced compensates.
Method of the present invention to broadband optical signal for example the light signal of C+L wave band directly carry out dispersion compensation, then the broadband optical signal behind the dispersion compensation is directly carried out the broadband and amplifies the insertion loss that remedies the broadband chromatic dispersion compensation device.
For example in C+L wave band dwdm system, can utilize the optical fiber passive dispersion compensator (FPDC) in broadband (C+L wave band) to carry out dispersion compensation, do not need to be divided into C-band like this and L-band carries out dispersion compensation, promptly to same fibre circuit, only need a FPDC that all wave bands are carried out dispersion compensation, and do not need two parts of FPDC respectively C-band part and L-band partly to be compensated, thereby the cost of the system of saving.
Fig. 1 is the residual dispersion curve that has adopted after the broadband chromatic dispersion compensation method of the present invention.As shown in Figure 1, at ambient temperature, the residual dispersion at wavelength 1550nm place is 0, be respectively near maximum residual dispersion on the radio frequency channel at wave-length coverage two ends-0.35ps/nm/km and+0.35ps/nm/km, promptly propagating 3000km is 1050ps/nm apart from the residual dispersion value that produces, and general dwdm system can be tolerated the chromatic dispersion of this degree.Surpass the application scenario of 3000km, can adopt first partial wave, carry out the mode of little compensation again,, need carry out adjustable meticulous dispersion compensation each radio frequency channel especially for the 40Gb/s system.
Fig. 2 provides a kind of in conjunction with the broadband chromatic dispersion compensation method of broadband optical signal amplification and the optical communication system example that adopts this method, and this system all adopts wide-band optical amplifier, i.e. the Raman light amplifier.As shown in Figure 2, in the optical fiber telecommunications system of the present invention, inchoation equipment is marked as that terminal sends out 20, receiving end equipment is marked as that terminal receives 30, trunking is marked as repeater 10, corresponding circuit optical fiber is labeled as 40.The number of repeater 10 is m on Fig. 2, and its concrete root of number reportedly lines length is selected.G.652 or G.655 circuit optical fiber 40 can be.
Terminal is sent out 20 and is closed 21, one Raman light amplifiers of wave band module 112 by 221,222 to 223, one of a plurality of wave band wave multiplexers and form.Wave band wave multiplexer 221 to 223 can have a plurality of according to the number difference of wave band, C-band wave multiplexer 221 shown in Fig. 2, L-band wave multiplexer 222, ...., x wave band wave multiplexers 223 etc., the function of each wave band wave multiplexer is that all a plurality of radio frequency channels in this wave band are synthesized a wave band optical signal.The effect of closing the wave band module is that a plurality of wave band optical signals are synthesized a broadband optical signal.Raman light amplifier 112 is forward light amplifiers, and major function is the loss of compensated line optical fiber 40.Send out in 20 at terminal, a plurality of radio frequency channel optical signals wave band wave multiplexer 221 to 223 synthetic a plurality of wave band optical signal outputs in each wave band, and then by closing wave band module 21 the light of all wave bands, all radio frequency channel light signals of system just, lump together the formation broadband optical signal, output on the optical link 40 after through forward direction Raman light amplifier 112 luminous power being amplified.
Relaying 10 is made up of to Broad-band Raman image intensifer 112 Raman light amplifier 111, dispersion compensator 12, the back in broadband.Wherein, at first be from the broadband optical signal of fibre circuit through later to Raman amplifier 111, the circuit optical signal power is promoted the insertion loss that causes with compensation broadband chromatic dispersion compensation device 12 following closely, any broadband chromatic dispersion compensation device 12 compensation of dispersion that pass through again, the last forward direction Raman light amplifier 112 that directly outputs to the broadband will output on next section fibre circuit 40 after the luminous power amplification.
Fig. 3 provides another kind of in conjunction with the broadband chromatic dispersion compensation method of broadband optical signal amplification and the embodiment that adopts the optical communication system of this method.Because at present the Broad-band Raman Amplifier Gain is less, generally 10 to 15dB, in order to strengthen the section of striding (i.e. distance between two repeaters) line length whenever, the method and system that the needs employing is shown in Figure 3.
Fig. 3 be a plurality of erbium-doped fiber amplifiers 51,52 of in trunking, adopting subrane ..., 53 replace the forward direction Broad-band Raman image intensifer 112 of Fig. 1 relayings.In the optical fiber telecommunications system of Fig. 3, inchoation equipment is marked as terminal and sends out, and trunking is marked as relaying, and receiving end equipment is marked as terminal and receives.Optical fiber telecommunications system shown in this embodiment by terminal send out 200, terminal receive 30 and repeater 100 forms, the number of repeater 100 is m, the reportedly lines length selection of its concrete root of number.
Terminal among Fig. 3 sends out 200 by wave band wave multiplexer 221 to 223, a plurality of erbium-doped fiber amplifier 51 to 53, close wave band module 21 forms.Wave band wave multiplexer 221 to 223 has a plurality of according to the number difference of wave band, C-band wave multiplexer 221 as example among Fig. 3, L-band wave multiplexer 222, ..., x wave band wave multiplexers 223 etc., the function of each wave band wave multiplexer 221 to 223 is that all the radio frequency channel light signals in this wave band are formed a wave band optical signal altogether.The major function of erbium-doped fiber amplifier 51 to 53 is losses of compensated line optical fiber 40.Send out in 200 at terminal, each radio frequency channel light signal at first in wave band by the wave band wave multiplexer, C-band wave multiplexer 221 among Fig. 3 for example, L-band wave multiplexer 222, ..., x wave band wave multiplexer 223 etc., synthetic one road wave band optical signal, each wave band optical signal be input to separately corresponding erbium-doped fiber amplifier 51,52 ... .53 amplifies, and then by closing mode piece 21 light of all wave bands (all radio frequency channels of system just) signal is lumped together and outputs on the optical link 40.
Relaying 100 by the back to Broad-band Raman image intensifer 111, dispersion compensator 12, subrane device module 31, is closed wave band module 21 and is formed a plurality of erbium-doped fiber amplifiers 51 to 53.The back is to remedy the insertion loss that dispersion compensator 12 causes to the major function of Broad-band Raman image intensifer 111.The quantity of a plurality of erbium-doped fiber amplifiers 51 to 53 has a plurality of according to the number difference of wave band, C-band erbium-doped fiber amplifier as example among Fig. 3, L-band erbium-doped fiber amplifier 52, ..., x wave band erbium-doped fiber amplifiers 53 etc., the function of each erbium-doped fiber amplifier is with all the radio frequency channel power amplifications in this wave band.The function of subrane module 31 is that total separate optical signals of circuit is become each wave band optical signal, so that utilize erbium-doped fiber amplifier to carry out light amplification.The function of closing wave band module 21 is each wave band optical signal after the erbium-doped fiber amplifier amplification more altogether, outputs on the circuit 40.Using the main effect of erbium-doped fiber amplifier is the loss of compensated line optical fiber 40, because gain of EDFA is big, generally can reach 30, therefore can be fit to long optical link span.In relaying 100, at first be that the line signal warp is later to Broad-band Raman image intensifer 111, line power is promoted, insertion loss with compensation broadband chromatic dispersion compensation device 12 introducings following closely, the circuit light signal is after 12 outputs of broadband chromatic dispersion compensation device, adopt subrane module 31 separately the light signal of each wave band, so that use each wave band erbium-doped fiber amplifier 51,52 ...., 53 the light signals of each wave band are amplified after, the light of all wave bands (all radio frequency channels of system just) lumped together output on the optical link 40 by closing mode piece 21 again.
Terminal is received 30 and is made up of Broad-band Raman image intensifer 111, dispersion compensator 12, subrane module 31, a plurality of erbium-doped fiber amplifier 51 to 53, wave band channel-splitting filter 321 to 323.The quantity of wave band channel-splitting filter 321 to 323 has a plurality of according to the number difference of wave band, as the C-band channel-splitting filter 321 of example among Fig. 3, L-band channel-splitting filter 322 ..., x wave band channel-splitting filters 323 etc., the function of each wave band channel-splitting filter are with separately output of all radio frequency channels in this wave band.The back is insertion losses that compensation of dispersion compensator 12 causes to the major function of Broad-band Raman image intensifer 111.The quantity of erbium-doped fiber amplifier 51 to 53 has a plurality of according to the number difference of wave band, C-band erbium-doped fiber amplifier 51 as example among Fig. 3, L-band erbium-doped fiber amplifier 52, ..., x wave band erbium-doped fiber amplifier 53 etc., the function of each erbium-doped fiber amplifier is with all the radio frequency channel power amplifications in this wave band, so that the optical receiver of each radio frequency channel (not showing among Fig. 3) receives.Receive in 30 at terminal, line signal at first warp promotes line power later to Broad-band Raman amplifier 111, with the insertion loss of compensation broadband chromatic dispersion compensation device 12 introducings following closely.The circuit light signal is exported behind broadband chromatic dispersion compensation device 12 compensation of dispersion, adopt subrane module 31 separately again the light signal of each wave band, so that use erbium-doped fiber amplifier 51,52 ...., 53 light signals with each wave band amplify in the scope that is fit to each radio frequency channel optical receiver.The wave band channel-splitting filter 321,322 of each wave band correspondence ...., 323 separate the radio frequency channel in each wave band, form the optical output signal of each radio frequency channel.
In the application of same line system, also can mix and use relaying 10 and relaying 100 according to the variation of span, promptly on big span, use the configuration of relaying 100, and on less span, use the configuration of relaying 10.
Specific descriptions in the foregoing description do not constitute limiting the scope of the invention just to explanation operation principle of the present invention and execution mode.Protection range of the present invention is limited by subsidiary claims.
Claims (5)
1. optical fiber telecommunications system that adopts broadband chromatic dispersion compensation, this system comprises inchoation equipment, trunking, receiving end equipment, wherein inchoation equipment consists of:
A plurality of wave band wave multiplexers synthesize a wave band optical signal with a plurality of radio frequency channel light signals on each wave band;
Close the wave band module, will synthesize a broadband optical signal from a plurality of wave band optical signals of a plurality of wave band wave multiplexers;
The Raman light amplifier after closing the broadband optical signal amplification of wave band module output, outputs on the circuit optical fiber;
Trunking consists of:
The Raman light amplifier, be connected broadband chromatic dispersion compensation optical fiber before, be used to compensate the insertion loss of described broadband chromatic dispersion compensation optical fiber;
Broadband chromatic dispersion compensation optical fiber is used for the chromatic dispersion of the described a plurality of wave bands on the compensated line optical fiber;
The Raman light amplifier, be connected broadband chromatic dispersion compensation optical fiber after, the light signal behind the dispersion compensation amplified output on next section circuit optical fiber;
Receiving end equipment consists of:
The Raman light amplifier, be connected broadband chromatic dispersion compensation optical fiber before, be used for the insertion loss of compensating wide band dispersion compensated fiber;
Broadband chromatic dispersion compensation optical fiber is used for the chromatic dispersion of the described a plurality of wave bands on the compensated line optical fiber;
The subrane module is used for the broadband optical signal after the compensation is divided into a plurality of wave bands;
A plurality of erbium-doped fiber amplifiers amplify each wave band optical signal from the subrane module respectively;
A plurality of wave band channel-splitting filters are divided into a plurality of radio frequency channel light signals with each wave band optical signal.
2. optical fiber telecommunications system that adopts broadband chromatic dispersion compensation, this system comprises inchoation equipment, trunking, receiving end equipment, wherein inchoation equipment consists of:
A plurality of wave band wave multiplexers synthesize a wave band optical signal with a plurality of radio frequency channel light signals on each wave band;
A plurality of erbium-doped fiber amplifiers amplify the wave band optical signal of each wave band wave multiplexer output respectively;
Close the wave band module, will synthesize a broadband optical signal, output on the circuit optical fiber from a plurality of wave band optical signals of a plurality of wave band wave multiplexers;
Trunking consists of:
The Raman light amplifier, be connected broadband chromatic dispersion compensation optical fiber before, be used for the insertion loss of compensating wide band dispersion compensated fiber;
Broadband chromatic dispersion compensation optical fiber is used for the chromatic dispersion of the described a plurality of wave bands on the compensated line optical fiber;
The subrane module is used for the broadband optical signal behind the dispersion compensation is divided into a plurality of wave band optical signals;
A plurality of erbium-doped fiber amplifiers are used for amplifying respectively each wave band optical signal;
Close the wave band module, be used for a plurality of wave band optical signals after amplifying are respectively synthesized a broadband optical signal, and output on next section circuit optical fiber;
Receiving end equipment consists of:
The Raman light amplifier, be connected broadband chromatic dispersion compensation optical fiber before, be used for the insertion loss of compensating wide band dispersion compensator optical fiber;
Broadband chromatic dispersion compensation optical fiber is used for the chromatic dispersion of the described a plurality of wave bands on the compensated line optical fiber;
The subrane module is used for the broadband optical signal after the compensation is divided into a plurality of wave bands;
A plurality of erbium-doped fiber amplifiers amplify each wave band optical signal from the subrane module respectively;
A plurality of wave band channel-splitting filters are divided into a plurality of radio frequency channel light signals with each wave band optical signal.
3. according to the system of one of claim 1 or 2, the quantity of wherein said trunking can suitably be selected according to the total distance of system transmissions, and whole system comprises more than one trunking.
4. a broadband chromatic dispersion compensation method that is used for optical fiber telecommunications system comprises the following steps
In process of transmitting:
A plurality of radio frequency channel light signals on each wave band are synthesized each wave band optical signal;
A plurality of wave band optical signals are synthesized a broadband optical signal;
After the broadband optical signal amplification, output on the circuit optical fiber;
In relay processes:
Before dispersion compensation, adopt the insertion loss of Raman light amplifier offset broadband chromatic dispersion compensation optical fiber;
Use the chromatic dispersion of a plurality of wave bands on the broadband chromatic dispersion compensation compensating optical fiber circuit optical fiber;
Light signal amplification after adopting the Raman light amplifier with dispersion compensation outputs on next section circuit optical fiber;
In receiving course:
Before dispersion compensation, adopt the insertion loss of Raman light amplifier offset broadband chromatic dispersion compensation optical fiber;
Use the chromatic dispersion of the described a plurality of wave bands on the broadband chromatic dispersion compensation compensating optical fiber circuit optical fiber;
Broadband optical signal after the compensation is divided into a plurality of wave bands;
Amplify each wave band optical signal respectively;
Each wave band optical signal is divided into a plurality of radio frequency channel light signals.
5. a broadband chromatic dispersion compensation method that is used for optical fiber telecommunications system comprises the following steps:
In process of transmitting:
A plurality of radio frequency channel light signals on each wave band are synthesized each wave band optical signal;
Amplify each wave band optical signal respectively;
A plurality of wave band optical signals are synthesized a broadband optical signal, output on the circuit optical fiber;
In relay processes:
Before dispersion compensation, adopt the insertion loss of Raman light amplifier offset broadband chromatic dispersion compensation optical fiber;
Use the chromatic dispersion of a plurality of wave bands on the broadband chromatic dispersion compensation compensating optical fiber circuit optical fiber;
Broadband optical signal behind the dispersion compensation is divided into a plurality of wave band optical signals;
Amplify each wave band optical signal respectively;
A plurality of wave band optical signals after amplifying are respectively synthesized broadband optical signal, and output on next section circuit optical fiber;
In receiving course:
Before dispersion compensation, adopt the insertion loss of Raman light amplifier offset dispersion compensating fiber;
Use the chromatic dispersion of a plurality of wave bands on the broadband chromatic dispersion compensation compensating optical fiber circuit optical fiber;
Broadband optical signal after the compensation is divided into a plurality of wave band optical signals; Amplify each wave band optical signal respectively;
Each wave band optical signal is divided into a plurality of radio frequency channel light signals.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2338964A1 (en) * | 2000-03-03 | 2001-09-03 | Xiang-Dong Cao | High capacity ultra-long haul dispersion and nonlinearity managed lightwave communication systems |
| EP1317083A2 (en) * | 2001-11-29 | 2003-06-04 | Fujitsu Limited | Optical transmission system and optical transmission method utilizing Raman amplification |
| CN1445598A (en) * | 2002-03-19 | 2003-10-01 | 三星电子株式会社 | Broadband optical fibre amplifier and wave division multiplex optical transmission system |
-
2004
- 2004-03-02 CN CNB2004100061054A patent/CN1320790C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2338964A1 (en) * | 2000-03-03 | 2001-09-03 | Xiang-Dong Cao | High capacity ultra-long haul dispersion and nonlinearity managed lightwave communication systems |
| EP1317083A2 (en) * | 2001-11-29 | 2003-06-04 | Fujitsu Limited | Optical transmission system and optical transmission method utilizing Raman amplification |
| CN1445598A (en) * | 2002-03-19 | 2003-10-01 | 三星电子株式会社 | Broadband optical fibre amplifier and wave division multiplex optical transmission system |
Non-Patent Citations (4)
| Title |
|---|
| Abrupt and asymptotic transience in DWDMsystems using backward-pumped fiber Raman amplifer Sihai Wang,JOURNAL OF LIGHTWAVE TECHNOLOGY,Vol.14 No.9 2002 * |
| Abrupt and asymptotic transience in DWDMsystems using backward-pumped fiber Raman amplifer Sihai Wang,JOURNAL OF LIGHTWAVE TECHNOLOGY,Vol.14 No.9 2002;High spectral density long-haul 40Gb/stransmission using CSRZ-DPSK format B.Zhu,JOURNAL OF LIGHTWAVE TECHNOLOGY,Vol.22 No.1 2004;Record spectral efficiencier and transmissioncapacities based on Nx43Gbit/s system Wilfried Idler,the 15th annual meeting of the IEEE,Vol.1 No.10.14 2002 * |
| High spectral density long-haul 40Gb/stransmission using CSRZ-DPSK format B.Zhu,JOURNAL OF LIGHTWAVE TECHNOLOGY,Vol.22 No.1 2004 * |
| Record spectral efficiencier and transmissioncapacities based on Nx43Gbit/s system Wilfried Idler,the 15th annual meeting of the IEEE,Vol.1 No.10.14 2002 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1561017A (en) | 2005-01-05 |
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