CN106936061B - A kind of raman amplifier of automatic gain monitoring and adjustment - Google Patents
A kind of raman amplifier of automatic gain monitoring and adjustment Download PDFInfo
- Publication number
- CN106936061B CN106936061B CN201511013603.6A CN201511013603A CN106936061B CN 106936061 B CN106936061 B CN 106936061B CN 201511013603 A CN201511013603 A CN 201511013603A CN 106936061 B CN106936061 B CN 106936061B
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- Prior art keywords
- gain
- pumping
- monitoring
- raman amplifier
- adjustment
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
- H01S3/10015—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by monitoring or controlling, e.g. attenuating, the input signal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
- H01S3/302—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects in an optical fibre
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of raman amplifiers of automatic gain monitoring and adjustment, including the fiber gain media and signal that are set in transmission fiber and pump light WDM, an output coupler is connected on the signal and pump light WDM, pump light WDM and pumping are connected on the output coupler, it is characterized by: the output coupler is connected with a gain detection unit and a gain control system in turn, the gain control system connects pumping.The raman amplifier of automatic gain monitoring and adjustment of the present invention, is capable of the gain monitoring of real-time monitoring raman amplifier, and realizes gain adjustment；The additional noisy communication channel of indwelling is avoided to monitor for gain；It is capable of the variation of the weld loss of real-time monitoring output end；Raman amplifier is in use, high power pumping enters optical fiber by output end, if output end welding misplaces, it will extreme influence influences the safety of route, and the present invention can monitor the problem, and reports control system.
Description
Technical field
The present invention relates to image intensifer field, in particular to a kind of raman amplifier of automatic gain monitoring and adjustment.
Background technique
In fiber optic communication systems, image intensifer has consequence.It is compared with erbium-doped fiber amplifier, Raman fiber
Amplifier has the advantage of distributed air-defense, has noise low, and non-linear effects are small, is suitable for long-distance optical communication signal amplification etc.
Feature.
In raman amplifier, gain monitoring and control is an important technical problem.In fibre circuit, due to line
Road aging, loss increase, and cause the gain set originally to reduce, need to increase pump power at this time, so that amplifier keeps former
There is the gain of setting.The gain for amplifier is needed to carry out real-time monitoring and adjustment thus.
The realization of Raman amplifier gain monitoring at present and adjustment has following scheme:
Scheme 1: by configuring optical power monitoring device in optic fibre input end and output end, the magnitude of power of input terminal is passed
Output end is given, adjusts raman pump power in output end.The program can not accomplish to monitor and adjust Raman gain in real time.
Scheme 2: the noise power by monitoring non-signal channel, to monitor the yield value of raman amplifier.The program
Limitation is one noise channel of needs to be monitored, and wastes the bandwidth of transmission.
Summary of the invention
In view of the above technical problems, the present invention proposes a kind of raman amplifier for capableing of automatic gain monitoring and adjustment.It should
Amplifier can be according to the Rayleigh scattering light of pumping, the automatic current gain for calculating raman amplifier；Current gain changes
When, which is capable of the power of adjust automatically pumping, reaches required gain.
In order to achieve the above objectives, technical solution provided by the invention are as follows: a kind of monitoring of automatic gain is put with the Raman adjusted
Big device, including the fiber gain media and signal that are set in transmission fiber and pump light WDM, the signal and pump light WDM
On be connected with an output coupler, pump light WDM and pumping are connected on the output coupler, it is characterised in that: described
Output coupler be connected with a gain detection unit and a gain control system in turn, the gain control system connects pump
Pu.
Preferably, the gain monitoring unit includes the pumping optical filter being sequentially connected with output coupler and pumping
Power detector.
Preferably, the pump power detector is the photodiode corresponding to pumping wave band.
Preferably, the gain control system includes and the sequentially connected first digital to analog conversion list of gain monitoring unit
Member, control chip, the second digital to analog conversion unit and pumping control circuit, the pumping control circuit connect pumping.
By above-mentioned technological means, the raman amplifier of automatic gain monitoring and adjustment of the present invention has following
Advantage:
1) it is capable of the gain monitoring of real-time monitoring raman amplifier, and realizes gain adjustment；
2) the additional noisy communication channel of indwelling is avoided to monitor for gain；
3) it is capable of the variation of the weld loss of real-time monitoring output end；
4) raman amplifier is in use, high power pumping enters optical fiber by output end, if output end welding misplaces, it will pole
The big safety for influencing route, the present invention can monitor the problem, and reports control system.
Detailed description of the invention
Fig. 1 is the signal that automatic gain of the present invention monitors and adjusts raman amplifier；
Fig. 2 Raman amplifier gain monitoring unit schematic diagram；
Fig. 3 Raman amplifier gain control system schematic diagram；
Attached drawing mark: 101, gain monitoring unit；102, gain control system；103, it pumps；104, fiber gain media；
105, signal and pump light WDM；106, pump light WDM；107, output coupler；108, optical filter is pumped；109, function is pumped
Rate detector；110, the first digital to analog conversion unit；111, chip is controlled；112, the second digital to analog conversion unit；113, pumping control
Circuit.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention will be further described.
As described in Figure 1, the raman amplifier of automatic gain monitoring and adjustment of the present invention, including it is set to transmission fiber
On fiber gain media 104 and signal and pump light WDM105, it is defeated to be connected with one on the signal and pump light WDM105
Coupler 107 out are connected with pump light WDM106 and pumping 104, while output coupler on the output coupler 107
107 are connected with a gain detection unit 101 and a gain control system 102 in turn, and the gain control system 102 connects pump
Pu.
Specifically, as shown in Fig. 2, the gain monitoring unit 101 includes the pump being sequentially connected with output coupler 107
Pu optical filter 108 and pump power detector 109, pump power detector 109 are two pole of photoelectricity corresponding to pumping wave band
Pipe.
As described in Figure 3, the gain control system 192 includes and the number of gain monitoring unit 102 sequentially connected first
Modular transformation unit 110, control chip 111, the second digital to analog conversion unit 112 and pumping control circuit 113, the pumping control
The connection of circuit 113 pumping 103.
When specifically used, by taking the raman amplifier of a backward pumping as an example.
1) optical signal is transmitted from input terminal to output end；Raman amplifier pumping from output end to input terminal reverse transfer,
Amplified signal；One optical power coupler is set in the couple input of the WDM of pumping input optical fibre, by the Raman amplifiction of reflection
The pump signal of device is drawn；
2) optical signal being coupled out is filtered out the light of its all band, leaves pump light by a pumping optical filter；
3) pumping light power is detected with pump power detector；
4) such as probe value and initial set value have abnormal increase, then in optic fibre input end, there are larger reflections, are judged as defeated
The weld of outlet reflects, and issues alarm；
5) such as probe value variation without exception, control unit determine current Raman amplifier gain according to probe value；
6) such as the gain not up to expection, control unit adjustment raman amplifier pump power.
Although specifically showing and describing the present invention in conjunction with preferred embodiment, those skilled in the art should be bright
It is white, it is not departing from the spirit and scope of the present invention defined by the appended claims, in the form and details to this hair
It is bright to make a variety of changes, it is protection scope of the present invention.
Claims (3)
1. a kind of raman amplifier of automatic gain monitoring and adjustment, including the fiber gain media and letter being set in transmission fiber
Number with pump light WDM, be connected with an output coupler on the signal and pump light WDM, connect on the output coupler
It is connected to pump light WDM and pumping, it is characterised in that: the output coupler is connected with a gain monitoring unit and one in turn and increases
Beneficial control system, the gain control system connect pumping；The gain monitoring unit include with output coupler successively
Connected pumping optical filter and pump power detector, for monitoring the pumping letter returned by raman amplifier reflection
Number.
2. the raman amplifier of a kind of automatic gain monitoring and adjustment according to claim 1, it is characterised in that: described
Pump power detector is the photodiode corresponding to pumping wave band.
3. a kind of raman amplifier of automatic gain monitoring and adjustment according to claim 1 or described in 2 any claims,
Be characterized in that: the gain control system includes and the sequentially connected first digital to analog conversion unit of gain monitoring unit, control
Chip, the second digital to analog conversion unit and pumping control circuit, the pumping control circuit connect pumping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511013603.6A CN106936061B (en) | 2015-12-31 | 2015-12-31 | A kind of raman amplifier of automatic gain monitoring and adjustment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511013603.6A CN106936061B (en) | 2015-12-31 | 2015-12-31 | A kind of raman amplifier of automatic gain monitoring and adjustment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106936061A CN106936061A (en) | 2017-07-07 |
| CN106936061B true CN106936061B (en) | 2019-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511013603.6A Active CN106936061B (en) | 2015-12-31 | 2015-12-31 | A kind of raman amplifier of automatic gain monitoring and adjustment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106936061B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1456932A (en) * | 2003-06-04 | 2003-11-19 | 清华大学 | Dynamic feedback regulating and controlling method for power and gain chart of optical fibre Raman amplifier |
| US6724524B1 (en) * | 2000-08-18 | 2004-04-20 | Corning Incorporated | Gain control in Raman amplifiers |
| CN1533079A (en) * | 2003-03-18 | 2004-09-29 | 中兴通讯股份有限公司 | Automatic control method and device for multiple pump Raman amplifier gain |
-
2015
- 2015-12-31 CN CN201511013603.6A patent/CN106936061B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6724524B1 (en) * | 2000-08-18 | 2004-04-20 | Corning Incorporated | Gain control in Raman amplifiers |
| CN1533079A (en) * | 2003-03-18 | 2004-09-29 | 中兴通讯股份有限公司 | Automatic control method and device for multiple pump Raman amplifier gain |
| CN1456932A (en) * | 2003-06-04 | 2003-11-19 | 清华大学 | Dynamic feedback regulating and controlling method for power and gain chart of optical fibre Raman amplifier |
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| Publication number | Publication date |
|---|---|
| CN106936061A (en) | 2017-07-07 |
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