CN106330326A - Erbium-doped optical fiber amplifier - Google Patents
Erbium-doped optical fiber amplifier Download PDFInfo
- Publication number
- CN106330326A CN106330326A CN201610693278.0A CN201610693278A CN106330326A CN 106330326 A CN106330326 A CN 106330326A CN 201610693278 A CN201610693278 A CN 201610693278A CN 106330326 A CN106330326 A CN 106330326A
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- China
- Prior art keywords
- module
- erbium
- fiber amplifier
- input
- doped fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000013307 optical fiber Substances 0.000 title abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 238000005086 pumping Methods 0.000 claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims description 25
- 239000000835 fiber Substances 0.000 claims description 22
- 238000005057 refrigeration Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 4
- 229910052691 Erbium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/293—Signal power control
- H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation
- H04B10/2942—Signal power control in a multiwavelength system, e.g. gain equalisation using automatic gain control [AGC]
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Lasers (AREA)
- Optical Communication System (AREA)
Abstract
The invention provides an erbium-doped optical fiber amplifier. An input end photo-isolator is arranged at the input end, an output end photo-isolator is arranged at the output end, the photo-isolators are used for preventing light reflection, reducing noise when the erbium-doped optical fiber amplifier works and improving the working reliability and stability of the erbium-doped amplifier, and an automatic gain control unit is set for realizing automatic gain control of the erbium-doped optical fiber amplifier and improving the reliability and the anti-interference capability; the automatic gain control unit comprises a photo-detector, a control module, a DA conversion module, a pumping drive module, a pumping laser, a temperature detection module and a refrigerating module, controls the output power of the pumping laser and the working temperature, and thus further improves the reliability and the anti-interference capability.
Description
Technical field
The present invention relates to fiber-optic transfer, particularly relate to erbium-doped fiber amplifier.
Background technology
Erbium-doped fiber amplifier can be used as relay amplifier in optical fiber telecommunications system, long for extending the transmission of arterial grid
Degree, can be used as preamplifier, for being inputted to photoreceiver by the least optical signal amplification, thus improves light-receiving again
The flexibility ratio of machine, also acts as post amplifier, is used for improving transmitting luminous power, it is seen then that erbium-doped fiber amplifier leads at optical fiber
Communication system plays very important effect.But, it is weak but to there is poor reliability, capacity of resisting disturbance in existing erbium-doped fiber amplifier
Problem, when optical signal by extraneous factor interference produce fluctuation time, erbium-doped fiber amplifier output instability, the most also can drop
Low stability of power supply and the control accuracy of temperature.
Summary of the invention
The present invention provides erbium-doped fiber amplifier, solves the poor reliability, anti-interference that existing Er-doped fiber sensor exists
The problem that ability is weak.
The present invention solves the problems referred to above by the following technical programs:
Erbium-doped fiber amplifier, including input optoisolator, light wavelength division multiplexing, outfan optoisolator, light filtering
Device and automatic gain control unit；
After described input optoisolator receives outside input light, input to light wavelength division multiplexing more defeated through Er-doped fiber
Enter to outfan optoisolator, then after optical filter is filtered, input to external loading；The output of described optical filter
Optical signal is further input in automatic gain control unit, automatic gain control unit control light wavelength division multiplexing.
Further, described automatic gain control unit includes that photo-detector, control module, D/A conversion module, pumping are driven
Dynamic model block and pump laser；
Described photo-detector receives the optical signal of optical filter output, and inputs to control module, control module according to
The power of photo-detector output, draws control instruction by process, and control instruction, after D/A conversion module carries out DA conversion, inputs
Drive in module to pumping, and then control pump laser.
Further, described control module is DSP, uses pid algorithm to change the driving unsteady flow of pump laser so that pump
The output of Pu laser instrument keeps stable.
Further, described automatic gain control unit also includes temperature detecting module and refrigeration module；Described temperature is examined
Surveying module and be used for detecting the temperature of pump laser, the temperature detected inputted to control module, control module is sentenced
Have no progeny, drive refrigeration module as required, to maintain pump laser to work at a constant temperature.
Further, described D/A conversion module is DAC0832.
Compared with prior art, have a characteristic that
1, input optoisolator is set at input, outfan optoisolator is set at outfan, be used for preventing light anti-
Penetrate, reduce noise during erbium-doped fiber amplifier work, improve the reliability and stability of erbium-based amplifier work, arrange automatically
Gain control unit, it is achieved the automatic growth control of erbium-doped fiber amplifier, improves reliability and capacity of resisting disturbance；
2, include that photo-detector, control module, D/A conversion module, pumping drive mould at described automatic gain control unit
Block, pump laser, temperature detecting module and refrigeration module, it is achieved output and the operating temperature to pump laser
Control, improve further reliability and capacity of resisting disturbance.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, but the invention is not limited in these embodiments.
Erbium-doped fiber amplifier, including input optoisolator, light wavelength division multiplexing, outfan optoisolator, light filtering
Device and automatic gain control unit；After described input optoisolator receives outside input light, input to light wavelength division multiplexing,
Input to outfan optoisolator through Er-doped fiber again, then after optical filter is filtered, input to external loading；Described
The optical signal of optical filter output is further input in automatic gain control unit, automatic gain control unit control light wavelength-division multiple
Use device.
Optoisolator is a kind of the Passive Optical Components allowing Unidirectional light to pass through, and can be well isolated from optical fiber echo reflection
Light, improves light wave transmissions efficiency.Optoisolator possesses the feature that forward insertion loss is low, reverse isolation degree high, return loss is high.
During transmission light, easily produce reflection light, result in additional noise, and reflection light enters pump laser, can draw
Play pump laser and produce big ups and downs so that poor system performance, input optoisolator is set at input, at outfan
Outfan optoisolator is set, is used for preventing luminous reflectance, reduce noise during erbium-doped fiber amplifier work, improve er-doped and amplify
The reliability and stability of device work.
Light wavelength division multiplexing is by a series of carrying informations, but the different optical signal synthesis of wavelength is a branch of, along simple optical fiber
Transmission, the light wavelength division multiplexing of the present invention for by through input optoisolator carry out optically isolated after optical signal swash with pumping
Light device produce laser signal be combined with each other, have with polarize unrelated, signal band is smooth, low cost, insertion loss are little
Characteristic.
Optical filter, for being demultiplexed by the optical signal that outfan optoisolator exports, isolates required wavelength.
Automatic gain control unit includes that photo-detector, control module, D/A conversion module and pumping drive module；Described
Photo-detector receives the optical signal of optical filter output, and inputs to control module, and control module exports according to photo-detector
Power, draw control instruction by process, control instruction after D/A conversion module carries out DA conversion, input to pumping drive mould
In block, and then control pump laser.
Luminous power, for detecting the luminous power of the optical signal of optical filter output, is converted to corresponding electricity by photo-detector
Stream, the performance indications of photo-detector affect the performance of erbium-doped fiber amplifier, and the photo-detector of the present invention is in optical wavelength range
Have highly sensitive, noise is little, quantum efficiency is high, the feature of fast response time.
Control module is DSP, uses pid algorithm to change the driving unsteady flow of pump laser so that pump laser defeated
Go out power and keep stable.Control module uses DSP, has the process fireballing feature of complex time sequence, in conjunction with pid algorithm so that
Erbium-based amplifier has more preferable reliability and capacity of resisting disturbance, moreover it is possible to the control promoting stability of power supply and temperature is accurate
Degree.PID i.e. proportional-integral-differential, is a kind of linear controller, obtains according to numerical value set in advance and actual output numerical value
Control deviation, by the deviation value obtained in proportion, integration and differential calculate controlled quentity controlled variable by linear combination, control pumping and drive
Galvanic electricity road.D/A conversion module is DAC0832, is converted to analogue signal for Digital Control instruction control module exported,
Input and drive in module to pumping, drive the output electric current of module by changing pumping, change the output of pump laser, it is achieved
Automatic growth control.
Further, automatic gain control unit also includes temperature detecting module and refrigeration module；Described temperature detection mould
The temperature detected, for detecting the temperature of pump laser, is inputted to control module by block, after control module judges,
Drive refrigeration module as required, to maintain pump laser to work at a constant temperature.In automatic gain control process, pump
Can the temperature of Pu laser instrument directly influence it and normally work, and the change of temperature can affect the change of gain, it is therefore desirable to protects
Card laser instrument works at a constant temperature.The operating temperature of temperature detecting module detection pump laser, when operating temperature exceedes
During normal working temperature, start refrigeration module so that pump laser maintains under normal working temperature.
Pump laser is low in energy consumption, and light light conversion efficiency may be up to more than 40%, greatly reduces operating cost；Performance can
Lean on, the life-span long, pump energy good stability, an excellent energy level, dependable performance than flash lamp pumping, service life is long, it is not necessary to
Safeguard；Output beam quality is good, the high conversion efficiency of pumping laser, reduces the thermal lensing effect of working-laser material, significantly changes
The output beam quality of kind pump laser.
Claims (5)
1. erbium-doped fiber amplifier, it is characterised in that:
Including input optoisolator, light wavelength division multiplexing, outfan optoisolator, optical filter and automatic growth control list
Unit；
After described input optoisolator receives outside input light, input is to light wavelength division multiplexing, then inputs extremely through Er-doped fiber
Outfan optoisolator, then after optical filter is filtered, input to external loading；The light letter of described optical filter output
Number it is further input in automatic gain control unit, automatic gain control unit controls light wavelength division multiplexing.
Erbium-doped fiber amplifier the most according to claim 1, it is characterised in that:
Described automatic gain control unit includes that photo-detector, control module, D/A conversion module, pumping drive module and pumping
Laser instrument；
Described photo-detector receives the optical signal of optical filter output, and inputs to control module, and control module is visited according to light
Surveying the power of device output, draw control instruction by process, control instruction is after D/A conversion module carries out DA conversion, and input is to pump
Pu drives in module, and then controls pump laser.
Erbium-doped fiber amplifier the most according to claim 1, it is characterised in that: described control module is DSP, uses PID
Algorithm changes the driving unsteady flow of pump laser so that the output of pump laser keeps stable.
Erbium-doped fiber amplifier the most according to claim 1, it is characterised in that: described automatic gain control unit also includes
Temperature detecting module and refrigeration module；Described temperature detecting module is for detecting the temperature of pump laser, the temperature that will detect
Degree inputs to control module, after control module judges, drives refrigeration module as required, to maintain pump laser to exist
Work under steady temperature.
Erbium-doped fiber amplifier the most according to claim 1, it is characterised in that: described D/A conversion module is DAC0832.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610693278.0A CN106330326A (en) | 2016-08-18 | 2016-08-18 | Erbium-doped optical fiber amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610693278.0A CN106330326A (en) | 2016-08-18 | 2016-08-18 | Erbium-doped optical fiber amplifier |
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| Publication Number | Publication Date |
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| CN106330326A true CN106330326A (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610693278.0A Pending CN106330326A (en) | 2016-08-18 | 2016-08-18 | Erbium-doped optical fiber amplifier |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004193541A (en) * | 2002-10-15 | 2004-07-08 | Nippon Telegr & Teleph Corp <Ntt> | Optical amplifier |
| CN102231473A (en) * | 2011-05-20 | 2011-11-02 | 上海光家仪器仪表有限公司 | EDFA (Erbium-doped optical fiber amplifier) |
| CN203896355U (en) * | 2014-04-01 | 2014-10-22 | 杭州西子光电网络有限公司 | Simulation fiber amplifier used for cable television system |
| CN204497558U (en) * | 2014-12-31 | 2015-07-22 | 珠海柏卫宽带电子有限公司 | The Erbium-Doped Fiber Amplifier of pump power high efficiency conversion |
| CN105375247A (en) * | 2015-11-17 | 2016-03-02 | 江苏阿尔特光电科技有限公司 | Erbium-doped optical fiber amplifier |
-
2016
- 2016-08-18 CN CN201610693278.0A patent/CN106330326A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004193541A (en) * | 2002-10-15 | 2004-07-08 | Nippon Telegr & Teleph Corp <Ntt> | Optical amplifier |
| CN102231473A (en) * | 2011-05-20 | 2011-11-02 | 上海光家仪器仪表有限公司 | EDFA (Erbium-doped optical fiber amplifier) |
| CN203896355U (en) * | 2014-04-01 | 2014-10-22 | 杭州西子光电网络有限公司 | Simulation fiber amplifier used for cable television system |
| CN204497558U (en) * | 2014-12-31 | 2015-07-22 | 珠海柏卫宽带电子有限公司 | The Erbium-Doped Fiber Amplifier of pump power high efficiency conversion |
| CN105375247A (en) * | 2015-11-17 | 2016-03-02 | 江苏阿尔特光电科技有限公司 | Erbium-doped optical fiber amplifier |
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Application publication date: 20170111 |
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