CN100359828C - A remote pump transmission system - Google Patents
A remote pump transmission system Download PDFInfo
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- CN100359828C CN100359828C CNB021525501A CN02152550A CN100359828C CN 100359828 C CN100359828 C CN 100359828C CN B021525501 A CNB021525501 A CN B021525501A CN 02152550 A CN02152550 A CN 02152550A CN 100359828 C CN100359828 C CN 100359828C
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- doped fiber
- receiving terminal
- pump light
- pumping
- light source
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Abstract
The present invention relates to a remote pump transmission system using the technology of electric communication, which comprises a transmitting terminal and a receiving terminal of an optical transmission system, and a remote pump amplifier in a transmission link. The remote pump transmission system is characterized in that an adjustable optical coupler is arranged at the receiving terminal, and pump light is divided into two path after directly passing the adjustable optical coupler, wherein one path is used as a pump light source of the remote pump amplifier, and the other path is used as a pump light source of local Erbium doped fibers connected with the receiving terminal. The pump light source acting on local Erbium doped fibers reversely or positively pumps the local Erbium doped fibers, a monitoring system which is connected in front of a wavelength-division multiplexer (DMUX) at the receiving terminal comprises a spectrum monitoring module and a control circuit, and relevant control information is directly fed back to the adjustable optical coupler through the control circuit. The present invention can maximumly exert the function of the remote pump amplifier, and can flexibly control the spectrum output of the system.
Description
Technical field
The present invention relates to electrical communication technology, relate in particular to a kind of distant pump transmission system.
Background technology
Distant pump Optical Amplification Technology is mainly used in the non-relay optical transmission system, in order to extend transmission distance, improve the system power budget, as shown in Figure 1, in signal transmission link, add the Er-doped fiber more than a section or a section, the pumping source of 1480nm wavelength can be placed on system terminal, i.e. transmitting terminal or receiving terminal from tens kilometers places of Er-doped fiber, by signal transmission fiber or special optical fiber pump light is sent to the Er-doped fiber place, realizes the amplification of flashlight.Among Fig. 1, the far-end pumping source of remote optical pumping amplifier is placed on receiving terminal, use be bypass backward pump mode, also can use the pumping of bypass forward direction and with road pumping modes such as (being that pump light is by the signal transmission fiber transmission).
In this Remote optical pumping amplifier structure, for sensitivity that improves receiver and the loss that compensates receiving terminal dispersion compensation module DCM introducing to a certain extent, after whole link signal transmission fiber, be receiving terminal used a preamplifier PA foremost, this preamplifier PA is generally gain locking, its gain spectral and noise figure are determined basically, like this, when system structure design, unique variable be exactly structure and the performance parameter of remote optical pumping amplifier ROPA, therefore, when carrying out remote optical pumping amplifier ROPA design, can occur for the complementation that realizes gain spectral shape between the different amplifiers to satisfy certain spectrum flatness, such as, for power amplifier BA, the coupling of remote optical pumping amplifier ROPA and preamplifier PA three gain spectral, and the size of sacrifice remote optical pumping amplifier ROPA gain, slackened the application potential of remote optical pumping amplifier ROPA so to a great extent, in addition, use power pre-emphasis at transmitting terminal, also can adjust the flatness of link output spectrum, but this method operates and is not convenient especially, and can't realize the real-time and dynamic adjustment.
Summary of the invention
The object of the present invention is to provide a kind of distant pump transmission system, can bring into play the remote optical pumping amplifier effect to greatest extent and can control realization link gain and the dynamic spectrum flatness of adjusting flexibly system's output spectrum.
The distant pump transmission system that realizes the object of the invention comprises the remote optical pumping amplifier in transmitting terminal, receiving terminal and the transmission link of optical transmission system, described remote optical pumping amplifier has the far-end pumping source, described system also comprises: erbium-doped fiber is arranged on the front end of described receiving terminal, as preamplifier; The tunable optical coupler, be connected to the output of the far-end pumping source of described remote optical pumping amplifier, be used for the power output of described far-end pumping source is divided into the two-way pump light source, one tunnel pump light source as described remote optical pumping amplifier, another road is as the pump light source of described erbium-doped fiber; Supervisory control system is arranged on described receiving terminal, is used to control the splitting ratio of described tunable optical coupler so that adjust the flatness of spectrum.
Described another road pump light process from the output of tunable optical coupler is arranged on the pump light source of the wavelength division multiplexer at Er-doped fiber rear as the local Er-doped fiber that is connected on receiving terminal, to this this locality Er-doped fiber backward pumping;
Described another road pump light process from the output of tunable optical coupler is arranged on the pump light source of the wavelength division multiplexer in Er-doped fiber the place ahead as the local Er-doped fiber that is connected on receiving terminal, to this this locality Er-doped fiber forward pumping;
Described local Er-doped fiber connects isolator;
Described supervisory control system is arranged on before the receiving terminal decomposition multiplex device DMUX, and this supervisory control system comprises optical spectrum monitor module and control circuit, and control circuit is controlled the splitting ratio of described tunable optical coupler by the feedback information of optical spectrum monitor module;
Described Er-doped fiber can be the Er-doped fiber of different levels of doping.
Beneficial effect of the present invention is: in the present invention, adopt one section Er-doped fiber to replace the preamplifier PA of receiving terminal in the prior art, by using a tunable optical coupler with the pump light separated into two parts, a part is as the pump light source of remote optical pumping amplifier in the transmission link, another part is as the pump light source of local Er-doped fiber, in use, realize the flatness of high-gain and (dynamically) adjustment spectrum by the size that changes coupling ratio.Like this, can under the constant situation of the power output that keeps pumping source, bring into play the effect of remote optical pumping amplifier as much as possible, improve its gain.Simultaneously, realize the adjustment of link waveform by the coupling ratio that changes the tunable optical coupler, make that whole link output spectrum is comparatively smooth, therefore, the present invention can bring into play the remote optical pumping amplifier effect to greatest extent and can control flexibly system's output spectrum, moreover, in the present invention, reduce the use of an image intensifer of receiving terminal, reduced cost, improved overall price/performance ratio of the present invention.Insert a supervisory control system before the receiving terminal Wave decomposing multiplexer DMUX, system's output spectrum is monitored, produce corresponding feedback information, coupling ratio to the tunable optical coupler is controlled, like this, the present invention can adjust in real time to system's output spectrum, has further improved operability of the present invention and practicality.
Description of drawings
Fig. 1 is a Remote optical pumping amplifier structural representation of the prior art;
Fig. 2 is embodiment 1 a system configuration schematic diagram;
Fig. 3 is embodiment 2 system configuration schematic diagrames.
Embodiment
With embodiment the present invention is described in further detail with reference to the accompanying drawings below:
Embodiment 1:
This distant pump transmission system comprises the remote optical pumping amplifier in transmitting terminal, receiving terminal and the transmission link of optical transmission system, described remote optical pumping amplifier has the far-end pumping source, and transmitting terminal comprises that wave multiplexer MUX, dispersion compensation module DCM also link to each other successively with power amplifier BA; The front end of receiving terminal directly uses one section Er-doped fiber EDF2 as preamplifier, EDF2 can be the Er-doped fiber of different levels of doping, the output of the far-end pumping source of described remote optical pumping amplifier is connected to a tunable optical coupler, the pump light of 1480nm wavelength directly is divided into two-way through this tunable optical coupler, one tunnel pump light source as described remote optical pumping amplifier encourages the Er-doped fiber EDF1 pumping in the remote optical pumping amplifier through wavelength division multiplexer WDM; Another road is as the pump light source of the local Er-doped fiber EDF2 that is connected on receiving terminal, as shown in Figure 2, this pump light source that is used for local Er-doped fiber EDF2 is through being connected on the wavelength division multiplexer WDM at EDF2 rear to this this locality Er-doped fiber EDF2 backward pumping, local Er-doped fiber EDF2 connects isolator ISO, be connected with dispersion compensation module DCM again in turn, amplifier Amplifiers and channel-splitting filter DMUX, connect a supervisory control system before the receiving terminal Wave decomposing multiplexer DMUX, this supervisory control system comprises optical spectrum monitor module and control circuit, and control circuit is controlled the splitting ratio of described tunable optical coupler by the feedback information of optical spectrum monitor module.
In use, realize high-gain and the dynamic flatness of adjusting spectrum by the size that changes coupling ratio, in this system, output as the 1480nm pump light of pumping source can be very high, its power output can be up to several watts, the pumping that only a few percent of its output need be used for local Er-doped fiber EDF2 is just enough, can not cause tangible influence to the output performance of remote optical pumping amplifier; But the minor variations of coupling ratio can produce significantly influence to the gain of the local Er-doped fiber EDF2 that directly is connected on receiving terminal and the shape of gain spectral, compensate the spectrum change that other factors cause with this, so, to a great extent, by being regulated, the pumping of local Er-doped fiber EDF2 finishes the adjustment of link waveform.
The supervisory control system that inserts is monitored system's output spectrum, produces corresponding feedback information, and the coupling ratio of tunable optical coupler is controlled in real time, adjusted, and makes system obtain comparatively smooth output spectrum.
Embodiment 2:
Present embodiment and embodiment 1 described difference are, as shown in Figure 3, wavelength division multiplexer WDM is connected on EDF2 the place ahead, the pump light source that is used for local Er-doped fiber EDF2 is to this this locality Er-doped fiber EDF2 forward pumping, and in embodiment 1, as shown in Figure 2, be used for the pump light source of local Er-doped fiber EDF2 to this this locality Er-doped fiber EDF2 backward pumping.
As for its operation principle and method, described identical with embodiment 1, repeat no more herein.
Claims (6)
1. one kind distant pump transmission system comprises the remote optical pumping amplifier in transmitting terminal, receiving terminal and the transmission link of optical transmission system, and described remote optical pumping amplifier has the far-end pumping source, it is characterized in that, described system also comprises: erbium-doped fiber is arranged on the front end of described receiving terminal, as preamplifier; The tunable optical coupler, be connected to the output of the far-end pumping source of described remote optical pumping amplifier, be used for the power output of described far-end pumping source is divided into the two-way pump light source, one tunnel pump light source as described remote optical pumping amplifier, another road is as the pump light source of described erbium-doped fiber; Supervisory control system is arranged on described receiving terminal, is used to control the splitting ratio of described tunable optical coupler so that adjust the flatness of spectrum.
2. distant pump transmission system according to claim 1, it is characterized in that: described another road pump light process from the output of tunable optical coupler is arranged on the pump light source of the wavelength division multiplexer at Er-doped fiber rear as the local Er-doped fiber that is connected on receiving terminal, to this this locality Er-doped fiber backward pumping.
3. distant pump transmission system according to claim 1, it is characterized in that: described another road pump light process from the output of tunable optical coupler is arranged on the pump light source of the wavelength division multiplexer in Er-doped fiber the place ahead as the local Er-doped fiber that is connected on receiving terminal, to this this locality Er-doped fiber forward pumping.
4. according to claim 2 or 3 described distant pump transmission systems, it is characterized in that: described local Er-doped fiber connects isolator.
5. according to claim 1 or 2 or 3 described distant pump transmission systems, it is characterized in that: described supervisory control system is arranged on before the receiving terminal decomposition multiplex device DMUX, comprise optical spectrum monitor module and control circuit, control circuit is controlled the splitting ratio of described tunable optical coupler so that adjust the flatness of spectrum by the feedback information of optical spectrum monitor module.
6. distant pump transmission system according to claim 1 is characterized in that: described Er-doped fiber can be the Er-doped fiber of different levels of doping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021525501A CN100359828C (en) | 2002-11-17 | 2002-11-17 | A remote pump transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021525501A CN100359828C (en) | 2002-11-17 | 2002-11-17 | A remote pump transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1501597A CN1501597A (en) | 2004-06-02 |
| CN100359828C true CN100359828C (en) | 2008-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021525501A Expired - Lifetime CN100359828C (en) | 2002-11-17 | 2002-11-17 | A remote pump transmission system |
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| CN (1) | CN100359828C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997612A (en) * | 2009-08-10 | 2011-03-30 | 华为技术有限公司 | Optical amplification device and optical repeater |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337155C (en) * | 2004-09-15 | 2007-09-12 | 华为技术有限公司 | Light transmission system and light amplifying method used therein |
| CN103166708B (en) * | 2013-03-14 | 2015-09-09 | 武汉光迅科技股份有限公司 | A kind of method improving Remote optical pumping amplifier output Optical Signal To Noise Ratio |
| CN104236696A (en) * | 2014-09-01 | 2014-12-24 | 中国石油天然气股份有限公司 | Optical fiber vibration detection method and system based on foreign fiber remote pump amplifying |
| CN104834070B (en) * | 2015-05-28 | 2018-03-13 | 武汉光迅科技股份有限公司 | One kind bypass remote optical pumping amplifier device |
| CN105262540B (en) * | 2015-07-24 | 2019-03-15 | 国家电网公司 | Multi-wavelength single span section transmission method and system |
| CN105258781B (en) * | 2015-09-24 | 2018-11-16 | 中国石油天然气股份有限公司 | A kind of fiber-optic vibration detection system and fiber-optic vibration detection method |
| EP3767842A1 (en) * | 2016-04-15 | 2021-01-20 | Xieon Networks S.à r.l. | Codirectional ropa implemented by a double-clad fiber |
| CN105910550A (en) * | 2016-06-24 | 2016-08-31 | 桂林创研科技有限公司 | Distributed optical fiber Bragg grating demodulation system |
| CN107171729B (en) * | 2017-07-20 | 2023-05-05 | 无锡市德科立光电子技术股份有限公司 | Relay-free transmission system with composite common pump source |
| CN109120370B (en) * | 2018-07-27 | 2020-05-12 | 武汉光迅科技股份有限公司 | DWDM remote pumping system capable of improving OSNR |
| CN112838893B (en) * | 2020-12-22 | 2022-03-29 | 武汉光迅科技股份有限公司 | Remote pump system, in-station pumping unit and method for automatically positioning fault of remote pump system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1193752A (en) * | 1997-03-13 | 1998-09-23 | 富士通株式会社 | Remotely pumping type multi-wavelength light transmission system |
| US6081366A (en) * | 1997-08-28 | 2000-06-27 | Lucent Technologies Inc. | Optical fiber communication system with a distributed Raman amplifier and a remotely pumped er-doped fiber amplifier |
| CN1264231A (en) * | 1999-02-19 | 2000-08-23 | 朗迅科技公司 | Optical signal transmission method for reducing degenerate caused by non-linear effect |
| US6292288B1 (en) * | 1998-07-23 | 2001-09-18 | The Furukawa Electric Co., Ltd. | Raman amplifier, optical repeater, and raman amplification method |
-
2002
- 2002-11-17 CN CNB021525501A patent/CN100359828C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1193752A (en) * | 1997-03-13 | 1998-09-23 | 富士通株式会社 | Remotely pumping type multi-wavelength light transmission system |
| US6081366A (en) * | 1997-08-28 | 2000-06-27 | Lucent Technologies Inc. | Optical fiber communication system with a distributed Raman amplifier and a remotely pumped er-doped fiber amplifier |
| US6292288B1 (en) * | 1998-07-23 | 2001-09-18 | The Furukawa Electric Co., Ltd. | Raman amplifier, optical repeater, and raman amplification method |
| CN1264231A (en) * | 1999-02-19 | 2000-08-23 | 朗迅科技公司 | Optical signal transmission method for reducing degenerate caused by non-linear effect |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997612A (en) * | 2009-08-10 | 2011-03-30 | 华为技术有限公司 | Optical amplification device and optical repeater |
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| CN1501597A (en) | 2004-06-02 |
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