CN204761440U - Overlength is apart from being bare transmission system - Google Patents
Overlength is apart from being bare transmission system Download PDFInfo
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- CN204761440U CN204761440U CN201520439054.8U CN201520439054U CN204761440U CN 204761440 U CN204761440 U CN 204761440U CN 201520439054 U CN201520439054 U CN 201520439054U CN 204761440 U CN204761440 U CN 204761440U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 105
- 230000003287 optical effect Effects 0.000 claims abstract description 138
- 239000000835 fiber Substances 0.000 claims abstract description 113
- 239000006185 dispersion Substances 0.000 claims abstract description 58
- 238000001069 Raman spectroscopy Methods 0.000 claims abstract description 47
- 238000005086 pumping Methods 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 abstract description 6
- 230000008054 signal transmission Effects 0.000 abstract description 6
- 239000013307 optical fiber Substances 0.000 description 8
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000005283 ground state Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 229940085805 fiberall Drugs 0.000 description 1
- 235000019580 granularity Nutrition 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model relates to an overlength is apart from being bare transmission system relates to electric power system communication field, owing to the signal transmission quality reduces in the optical transmission net OTN transmission of solution large capacity light, has restricted transmission distance's problem, the system includes: the wave multiplexer that connects gradually by transmission fiber, first chromatic dispersion compensated fiber, light power amplifier, preceding to raman amplifier, distant pump amplifier, back to raman amplifier, second chromatic dispersion compensated fiber, preamplifier, wave separator. The utility model is suitable for an optical transmission net OTN overlength apart from the transmission of large capacity light.
Description
Technical field
The present invention relates to a kind of power system communication field, particularly relate to a kind of ultra long haul optical transmission system.
Background technology
In the last few years, along with the development of optical fiber transmission technique, optical-fiber network has become the important component part of whole communication network, the application of Most current optical-fiber network is OTN (optical transfer network, OpticalTransportNetwork), the basic object of OTN process is wavelength level business, transport network is advanced to the real multi-wavelength light network stage, owing to combining the advantage of area of light and electrical domain process, OTN is the best techniques transmitting broadband services of large granularities.
At present due to the energy demand of different regions and the imbalance of supply, the Optical Transmission Network OTN OTN transmission technology of Large Copacity light is more and more subject to people's attention, but the absorption of optical fiber and scattering can cause the decay of light signal, the dispersion of optical fiber will make light pulse distort, the error rate is caused to increase, signal transmission quality reduces, and limit transmission range, the ultra long haul transmission technology of Large Copacity light is not yet ripe.
Summary of the invention
In view of this, the invention provides a kind of ultra long haul optical transmission system, main purpose to be to solve in the OTN transmission of Large Copacity light because signal transmission quality reduces, and limits the problem of transmission range.
For achieving the above object, the present invention mainly provides following technical scheme:
On the one hand, embodiments of the invention provide a kind of ultra long haul optical transmission system, comprising:
Wave multiplexer, the first dispersion compensating fiber, power amplifier, forward direction raman amplifier, remote optical pumping amplifier, backward raman amplifier, the second dispersion compensating fiber, preamplifier, channel-splitting filter, wherein: described wave multiplexer is connected with optical sender, and be arranged on one end of transmission line corresponding to described system, the multipath light signal that described wave multiplexer is used for described optical sender to send carries out the process of conjunction ripple, obtains multichannel and closes wave optical signal; Described first dispersion compensating fiber is connected with described wave multiplexer, carries out dispersion compensation for the light pulse that described multichannel is closed wave optical signal corresponding; Described power amplifier is connected with described first dispersion compensating fiber, carries out the power that the multichannel after dispersion compensation closes wave optical signal for improving by described first dispersion compensating fiber; Described forward direction raman amplifier is connected with described power amplifier, improves intensity and the signal to noise ratio that the multichannel after power closes wave optical signal for improving by described power amplifier; Described remote optical pumping amplifier is connected with described forward direction raman amplifier by the first Transmission Fibers, closes the power of wave optical signal for improving the multichannel after by described first Transmission Fibers transmission; Described backward raman amplifier is connected with described remote optical pumping amplifier by the second Transmission Fibers, closes intensity and the signal to noise ratio of wave optical signal for improving the multichannel after by described second Transmission Fibers transmission; Described second dispersion compensating fiber is connected with described backward raman amplifier, and dispersion compensation is carried out in the light pulse that the multichannel for described backward raman amplifier is improved intensity and signal to noise ratio closes wave optical signal corresponding; Described preamplifier is connected with described second dispersion compensating fiber, carries out the power that the multichannel after dispersion compensation closes wave optical signal for improving by described second dispersion compensating fiber; Described channel-splitting filter is connected with described preamplifier, opposite side is connected with optical receiver, and is arranged on the other end of described transmission line, carries out partial wave process for described multichannel is closed wave optical signal, obtain multipath light signal, receive described multipath light signal to make described optical receiver.
Preferably, described system also comprises: light repeat in work machine, for the treatment of described ultra long haul optical transmission system.
Preferably, the compensation rate of described first dispersion compensating fiber is 40KM, and it is the dispersion compensating fiber of 100KM that described second dispersion compensating fiber comprises two compensation rates connected.
Preferably, described first Transmission Fibers and optical cable corresponding to described second Transmission Fibers are 24 cores G.652D layer-twisted type aerial fiber cables.
Preferably, the length of described first Transmission Fibers is 205.859KM, and the length of described second Transmission Fibers is 80.017KM.
Preferably, the length of described first Transmission Fibers is 209.704KM, and the length of described second Transmission Fibers is 76.172KM.
Preferably, the speed of the light signal transmitted in described transmission line is 10Gbps.
Preferably, described remote optical pumping amplifier comprises: distant pump gain unit and bypass pump unit.
Preferably, described optical sender and optical cable fibre core corresponding to described optical receiver are the first fibre core of fiber unit frame ODF frame, and optical cable fibre core corresponding to described distant pump pump unit is the second fibre core of ODF frame.
Preferably, described optical sender and optical cable fibre core corresponding to described optical receiver are the 3rd fibre core of ODF frame, and optical cable fibre core corresponding to described distant pump pump unit is the second fibre core of ODF frame.
By technique scheme, ultra long haul optical transmission system of the present invention at least has following advantages:
A kind of ultra long haul optical transmission system provided by the invention, is first connected wave multiplexer with optical sender, and is arranged on one end of transmission line corresponding to described system; Again the first dispersion compensating fiber is connected with described wave multiplexer; Then power amplifier is connected with described first dispersion compensating fiber; Subsequently forward direction raman amplifier is connected with described power amplifier; Subsequently remote optical pumping amplifier is connected with described forward direction raman amplifier by the first Transmission Fibers; Subsequently backward raman amplifier is connected with described remote optical pumping amplifier by the second Transmission Fibers; Subsequently the second dispersion compensating fiber is connected with described backward raman amplifier; Subsequently preamplifier is connected with described second dispersion compensating fiber; Finally channel-splitting filter is connected with described preamplifier, opposite side is connected with optical receiver, and be arranged on the other end of described transmission line, can solve in the Optical Transmission Network OTN OTN transmission of Large Copacity light because signal transmission quality reduces, limit the problem of transmission range, improve the quality of ultra long haul optical communication.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of specification, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of ultra long haul optical transmission system that embodiments of the invention provide.
Fig. 2 is the structural representation of a kind of ultra long haul optical transmission system that the preferred embodiments of the present invention provide.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to according to the embodiment of the present patent application, structure, feature and effect thereof, be described in detail as follows.In the following description, the not necessarily same embodiment that different " embodiment " or " embodiment " refers to.In addition, special characteristic, structure or feature in one or more embodiment can be combined by any suitable form.
As shown in Figure 1, a kind of ultra long haul optical transmission system that one embodiment of the present of invention propose, it comprises:
Wave multiplexer 101, first dispersion compensating fiber 102, power amplifier 103, forward direction raman amplifier 104, remote optical pumping amplifier 105, backward raman amplifier 106, second dispersion compensating fiber 107, preamplifier 108, channel-splitting filter 109, wherein: described wave multiplexer 101 is connected with optical sender, and is arranged on one end of transmission line corresponding to described system; Described first dispersion compensating fiber 102 is connected with described wave multiplexer 101; Described power amplifier 103 is connected with described first dispersion compensating fiber 102; Described forward direction raman amplifier 104 is connected with described power amplifier 103; Described remote optical pumping amplifier 105 is connected with described forward direction raman amplifier 104 by the first Transmission Fibers 110; Described backward raman amplifier 106 is connected with described remote optical pumping amplifier 105 by the second Transmission Fibers 111; Described second dispersion compensating fiber 107 is connected with described backward raman amplifier 106; Described preamplifier 108 is connected with described second dispersion compensating fiber 107; Described channel-splitting filter 109 is connected with described preamplifier 108, and opposite side is connected with optical receiver, and is arranged on the other end of described transmission line.
Described wave multiplexer 101 carries out the process of conjunction ripple for the multipath light signal sent by described optical sender, obtains multichannel and closes wave optical signal; Described first dispersion compensating fiber 102 carries out dispersion compensation for the light pulse that described multichannel is closed wave optical signal corresponding; Described power amplifier 103 carries out by described first dispersion compensating fiber 102 power that the multichannel after dispersion compensation closes wave optical signal for improving; Described forward direction raman amplifier 104 improves by described power amplifier 103 intensity and the signal to noise ratio that the multichannel after power closes wave optical signal for improving; Described remote optical pumping amplifier 105 closes the power of wave optical signal for improving the multichannel after being transmitted by described first Transmission Fibers 110; Described backward raman amplifier 106 closes intensity and the signal to noise ratio of wave optical signal for improving the multichannel after being transmitted by described second Transmission Fibers 111; Dispersion compensation is carried out in the light pulse that described second dispersion compensating fiber 107 closes wave optical signal corresponding for the multichannel described backward raman amplifier 106 being improved intensity and signal to noise ratio; Described preamplifier 108 carries out by described second dispersion compensating fiber 107 power that the multichannel after dispersion compensation closes wave optical signal for improving; Carry out partial wave process for described multichannel is closed wave optical signal described in described channel-splitting filter 109, obtain multipath light signal.
For the embodiment of the present invention, have employed forward direction raman amplifier 104 and combine with remote optical pumping amplifier 105, and the mode that remote optical pumping amplifier 105 combines with backward raman amplifier 106.Described remote optical pumping amplifier 105 is after entering optical fiber by small-signal, because rare earth ion (such as Er3+) returns ground state from first excited state transition and obtains a large amount of gains, thus realizes the amplification of light signal.In this process along with the Er3+ ion of spontaneous falling ground state, and then produce noise.Therefore, be especially mainly used in the power amplifier 103 improving optical signal power, although its gain is very high, correspondingly noise figure is also high.Described forward direction raman amplifier 104 and described backward raman amplifier 106 are the image intensifers based on stimulated Raman scattering mechanism, it is a kind of optical fiber all band amplifier, therefore the scene of its application is boundless, forward direction raman amplifier 104 and backward raman amplifier 106 also have many advantages simultaneously, such as: gain media is normal transmission optical fiber, has good compatibility with fibre system; Gain wavelength is determined by pump wavelength, not by the restriction of other factors, as long as the wavelength of pumping source is suitable in theory, just can amplify the signal of any wavelength; Gain compared with high, crosstalk is little, noise figure is low, spectral range is wide, temperature performance is good.
For the embodiment of the present invention, compared with described remote optical pumping amplifier 105, the gain amplifier of described forward direction raman amplifier 104 and described backward raman amplifier 106 is relatively low, but the noise figure of described forward direction raman amplifier 104 and described backward raman amplifier 106 is lower than remote optical pumping amplifier 105, therefore, forward direction raman amplifier 104 is combined with remote optical pumping amplifier 105, and the mode that remote optical pumping amplifier 105 combines with backward raman amplifier 106 uses, compared to only adopting remote optical pumping amplifier 105, the former signal power fluctuations is less, both non-linear threshold was not exceeded at every section of optic fibre input end, also decay is not a lot of in the transmission, thus effectively improve the Optical Signal To Noise Ratio of system, decrease nonlinear distortion, reduce desired signal input power, extend system transfers distance.
For the embodiment of the present invention, noise figure due to forward direction raman amplifier 104 is low and gain media can be ordinary optic fibre, forward direction raman amplifier 104 is combined with described power amplifier 103, under the prerequisite ensureing lower noise figure, improve the power of the light signal in ultra long haul optical transmission system, the ultra long haul optical transmission system formed by above-mentioned syndeton, low noise can be obtained, high-gain and the high effect of temperature stability, solve in the Optical Transmission Network OTN OTN transmission of Large Copacity light because signal transmission quality reduces, limit the problem of transmission range, improve the quality of ultra long haul optical communication.
Preferably, the ultra long haul optical transmission system for the embodiment of the present invention also comprises: light repeat in work machine, for the treatment of described ultra long haul optical transmission system.Wherein, the model of described smooth repeat in work machine can be 1830PSS.Add the controlling to described ultra long haul optical transmission system, ensure that the controllability of described ultra long haul optical transmission system.
Preferably, the compensation rate for the first dispersion compensating fiber in the ultra long haul optical transmission system of the embodiment of the present invention is 40KM, and it is the dispersion compensating fiber of 100KM that the second dispersion compensating fiber comprises two compensation rates connected.
Preferably, be 24 cores G.652D layer-twisted type aerial fiber cables for the first Transmission Fibers in the ultra long haul optical transmission system of the embodiment of the present invention and optical cable corresponding to the second Transmission Fibers, ensure that the transmission quality of transmission light.
Preferably, length for the first Transmission Fibers in the ultra long haul optical transmission system of the embodiment of the present invention and the second Transmission Fibers can be respectively 205.859KM and 80.017KM, also 209.704KM and 76.172KM can be respectively, total length is 285.876KM, and what ensure that the Optical Transmission Network OTN OTN ultra long haul of Large Copacity light can transporting.
Preferably, ultra long haul optical transmission system for the embodiment of the present invention also can be applied in the optical communication system of short distance, and also can be applied in dissimilar optical transmission system, the speed of the light signal transmitted in the transmission line that described ultra long haul optical transmission system is corresponding can be 10Gbps, also can be 2.5Gbps.
Preferably, be used in unrepeatered system for the remote optical pumping amplifier in the ultra long haul optical transmission system of the embodiment of the present invention, system power budget can be improved, extend transmission span, realize principle for by the long-range fiber amplifier providing pump light to realize light amplification, as image intensifer, pump light and gain media are absolutely necessary, therefore comprise: as distant pump gain unit and the bypass pump unit providing pumping source of gain, described remote optical pumping amplifier can be Erbium-Doped Fiber Amplifier, may be used for the wavelength adjusting light signal, further, ensure that the controllability of output wavelength.
Preferably, for the first fibre core that the described optical sender in the ultra long haul optical transmission system of the embodiment of the present invention and optical cable fibre core corresponding to described optical receiver can be ODF frame, also can be the 3rd fibre core of ODF frame, optical cable fibre core corresponding to described distant pump pump unit be the second fibre core of ODF frame.
The application scenarios of the method that the preferred embodiment of the present invention provides can be as follows, but be not limited thereto, and comprising:
Such as, as shown in Figure 2, in the preferred embodiment of the present invention, provide a kind of ultra long haul optical transmission system, wherein said system by 24 cores G.652D layer-twisted type aerial fiber cable lay, lay two ends and be respectively website A and website B, lightguide cable link total length is 285.876KM, wherein, lightguide cable link length between website A to remote optical pumping amplifier is 205.859KM, lightguide cable link length between remote optical pumping amplifier to website B is the 40 wavelength light transmission rates of 80.017KM, C1 to C40 is 10Gb/s, and wastage in bulk or weight is 59.26dB.
System line is tested:
Website A is 42.13dBm to the fibre core #7 line loss of remote optical pumping amplifier, and remote optical pumping amplifier is 17.71dBm to the fibre core #7 fibre core line loss of website B, and remote optical pumping amplifier is 20.9dBm to the #5 fibre core line loss of website B.The pumping light power that wherein in remote optical pumping amplifier, bypass pump unit exports is 31dBm, and the pumping light power of the distant pump gain unit of input remote optical pumping amplifier is 10.1dBm.
As shown in Figure 2, respectively to test the luminous power of key point as shown in the table for system:
Wherein, the first dispersion compensating fiber insertion loss 4.1dB, i.e. P
a-P
b=1.3-(-2.8)=4.1, wherein, P
afor the luminous power that A node records, P
bfor the luminous power that B node records, lower same;
Power amplifier gain 22.8dB, i.e. P
c-P
b=20-(-2.8)=22.8;
Distant pump gain unit gain 16.78dB, i.e. P
f-P
e=3.28-(-13.5)=16.78;
Backward Raman amplifier gain 14dB, i.e. P
h-P
g=-1.3-(-15.3)=14;
Second dispersion compensating fiber insertion loss 17.1dB, i.e. P
h-P
i=-1.3-(-18.4)=17.1;
Pregain 22.4dB, i.e. P
j-P
i=4.0-(-18.4)=22.4.
The FEC error correction rate of test, the maximum of 40 wavelength is 1.26E-6, minimum value is 0, the Optical Signal To Noise Ratio of system, the maximum of 40 wavelength is 19.09dB, minimum value is 16.61dB, can show that ultra long haul optical transmission system provided by the invention still has certain surplus, can meet 40 wavelength full configuration business and run without error code.
For a kind of ultra long haul optical transmission system provided by the invention, comprise the wave multiplexer, the first dispersion compensating fiber, power amplifier, forward direction raman amplifier, remote optical pumping amplifier, backward raman amplifier, the second dispersion compensating fiber, preamplifier, the channel-splitting filter that are connected successively by Transmission Fibers, can solve Large Copacity light Optical Transmission Network OTN OTN transmit in due to signal transmission quality reduce, limit the problem of transmission range.
The above, it is only preferred embodiment of the present invention, not do any pro forma restriction to the present invention, any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. a ultra long haul optical transmission system, is characterized in that, comprising:
Wave multiplexer, the first dispersion compensating fiber, power amplifier, forward direction raman amplifier, remote optical pumping amplifier, backward raman amplifier, the second dispersion compensating fiber, preamplifier, channel-splitting filter, wherein:
Described wave multiplexer is connected with optical sender, and is arranged on one end of transmission line corresponding to described system, and the multipath light signal that described wave multiplexer is used for described optical sender to send carries out the process of conjunction ripple, obtains multichannel and closes wave optical signal;
Described first dispersion compensating fiber is connected with described wave multiplexer, carries out dispersion compensation for the light pulse that described multichannel is closed wave optical signal corresponding;
Described power amplifier is connected with described first dispersion compensating fiber, carries out the power that the multichannel after dispersion compensation closes wave optical signal for improving by described first dispersion compensating fiber;
Described forward direction raman amplifier is connected with described power amplifier, improves intensity and the signal to noise ratio that the multichannel after power closes wave optical signal for improving by described power amplifier;
Described remote optical pumping amplifier is connected with described forward direction raman amplifier by the first Transmission Fibers, closes the power of wave optical signal for improving the multichannel after by described first Transmission Fibers transmission;
Described backward raman amplifier is connected with described remote optical pumping amplifier by the second Transmission Fibers, closes intensity and the signal to noise ratio of wave optical signal for improving the multichannel after by described second Transmission Fibers transmission;
Described second dispersion compensating fiber is connected with described backward raman amplifier, and dispersion compensation is carried out in the light pulse that the multichannel for described backward raman amplifier is improved intensity and signal to noise ratio closes wave optical signal corresponding;
Described preamplifier is connected with described second dispersion compensating fiber, carries out the power that the multichannel after dispersion compensation closes wave optical signal for improving by described second dispersion compensating fiber;
Described channel-splitting filter is connected with described preamplifier, opposite side is connected with optical receiver, and is arranged on the other end of described transmission line, carries out partial wave process for described multichannel is closed wave optical signal, obtain multipath light signal, receive described multipath light signal to make described optical receiver.
2. system according to claim 1, is characterized in that, described system also comprises:
Light repeat in work machine, for the treatment of described ultra long haul optical transmission system.
3. system according to claim 1, is characterized in that, the compensation rate of described first dispersion compensating fiber is 40KM, and it is the dispersion compensating fiber of 100KM that described second dispersion compensating fiber comprises two compensation rates connected.
4. system according to claim 1, is characterized in that, described first Transmission Fibers and optical cable corresponding to described second Transmission Fibers are 24 cores G.652D layer-twisted type aerial fiber cables.
5. system according to claim 1, is characterized in that, the length of described first Transmission Fibers is 205.859KM, and the length of described second Transmission Fibers is 80.017KM.
6. system according to claim 1, is characterized in that, the length of described first Transmission Fibers is 209.704KM, and the length of described second Transmission Fibers is 76.172KM.
7. system according to claim 1, is characterized in that, the speed of the light signal transmitted in described transmission line is 10Gbps.
8. system according to claim 1, is characterized in that, described remote optical pumping amplifier comprises: distant pump gain unit and bypass pump unit.
9. system according to claim 1, is characterized in that, described optical sender and optical cable fibre core corresponding to described optical receiver are the first fibre core of fiber unit frame ODF frame, and optical cable fibre core corresponding to described distant pump pump unit is the second fibre core of ODF frame.
10. system according to claim 1, is characterized in that, described optical sender and optical cable fibre core corresponding to described optical receiver are the 3rd fibre core of ODF frame, and optical cable fibre core corresponding to described distant pump pump unit is the second fibre core of ODF frame.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104726A (en) * | 2017-03-31 | 2017-08-29 | 国网新疆电力公司信息通信公司 | The method and system of test optical fibre cables loss |
| CN107888291A (en) * | 2017-10-12 | 2018-04-06 | 武汉邮电科学研究院 | Signal compensation apparatus and method in a kind of fiber optic communication of two-way Raman amplifiction |
| WO2020024544A1 (en) * | 2018-08-01 | 2020-02-06 | 武汉光迅科技股份有限公司 | Dispersion compensation device and method |
| CN111490826A (en) * | 2020-04-10 | 2020-08-04 | 武汉光迅科技股份有限公司 | Remote pump amplifier and optical communication system |
| CN113691316A (en) * | 2021-09-06 | 2021-11-23 | 福建永福电力设计股份有限公司 | Method for processing OTN optical amplifier and dispersion compensation |
| CN115361065A (en) * | 2022-06-20 | 2022-11-18 | 北京邮电大学 | Long-distance unrepeatered optical signal frequency transmission method and system |
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2015
- 2015-06-24 CN CN201520439054.8U patent/CN204761440U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104726A (en) * | 2017-03-31 | 2017-08-29 | 国网新疆电力公司信息通信公司 | The method and system of test optical fibre cables loss |
| CN107888291A (en) * | 2017-10-12 | 2018-04-06 | 武汉邮电科学研究院 | Signal compensation apparatus and method in a kind of fiber optic communication of two-way Raman amplifiction |
| CN107888291B (en) * | 2017-10-12 | 2020-01-31 | 武汉邮电科学研究院 | bidirectional Raman amplification signal compensation system and method in optical fiber communication |
| WO2020024544A1 (en) * | 2018-08-01 | 2020-02-06 | 武汉光迅科技股份有限公司 | Dispersion compensation device and method |
| CN111490826A (en) * | 2020-04-10 | 2020-08-04 | 武汉光迅科技股份有限公司 | Remote pump amplifier and optical communication system |
| CN113691316A (en) * | 2021-09-06 | 2021-11-23 | 福建永福电力设计股份有限公司 | Method for processing OTN optical amplifier and dispersion compensation |
| CN113691316B (en) * | 2021-09-06 | 2022-05-17 | 福建永福电力设计股份有限公司 | Method for processing OTN optical amplifier and dispersion compensation |
| CN115361065A (en) * | 2022-06-20 | 2022-11-18 | 北京邮电大学 | Long-distance unrepeatered optical signal frequency transmission method and system |
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Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee after: INFORMATION COMMUNICATION BRANCH, STATE GRID JIBEI ELECTRIC POWER Co. Patentee after: STATE GRID CORPORATION OF CHINA Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee before: INFORMATION COMMUNICATION BRANCH, STATE GRID JIBEI ELECTRIC POWER Co. Patentee before: State Grid Corporation of China |
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Granted publication date: 20151111 |
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| CF01 | Termination of patent right due to non-payment of annual fee |