CN102280803A - Pulse fiber amplifier - Google Patents
Pulse fiber amplifier Download PDFInfo
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- CN102280803A CN102280803A CN2011101882212A CN201110188221A CN102280803A CN 102280803 A CN102280803 A CN 102280803A CN 2011101882212 A CN2011101882212 A CN 2011101882212A CN 201110188221 A CN201110188221 A CN 201110188221A CN 102280803 A CN102280803 A CN 102280803A
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Abstract
The invention discloses a pulse fiber amplifier, which has a pre-amplification and main amplification two-stage amplification structure integrally. At a pre-amplification stage, a highly doped single mode ytterbium-doped fiber is used as a gain medium, and at a main amplification stage, a ytterbium-doped double-clad fiber with a large core diameter is used as a gain medium, and an isolate component is arranged between the two stages, so the pulse fiber amplifier can work at a lower repeat frequency (hertz magnitude), and can amplify pulses with watt-grade peak power into pulses with kilowatt-grade peak power. The amplifier has a special structure and can be used for research in the field of low repeat frequency and high power pulse amplification.
Description
Technical field
The present invention relates to a kind of optical fiber technology field, be specifically related to a kind of pulse fiber amplifier.
Background technology
At present, most pulse fiber amplifier mainly is to use Er-doped fiber as gain media, and it mainly is made up of Er-doped fiber (EDF), pump laser (Pump-LD), optical passive component, control unit and five essential parts of monitor-interface (communication interface).Wherein optical passive component comprises: wavelength division multiplexer (WDM), optical isolator (ISO), the optical fiber connector (FC/APC) and optical coupler (Coupler).The wavelength division multiplexer effect is that flashlight and pump light are coupled into Er-doped fiber, optical isolator is to prevent that backlight is to the influence of erbium-doped fiber amplifier (EDFA) in the light path, the optical fiber connector make erbium-doped fiber amplifier and being connected of communication system or lightguide cable link become easy, go out a part of light (about 5%) delivers to photo-detector (PIN) to optical coupler along separate routes from input and output, by control unit the work of fiber amplifier is controlled incessantly, monitor-interface provides the fiber amplifier work state information to transmission system, guarantee the parts of fiber amplifier, bring unified network monitoring into as transmission system.Above-mentioned erbium-doped fiber amplifier works under higher repetition rate (megahertz or GHz magnitude) and low-power (milliwatt magnitude) condition usually, is mainly used in the fiber optic communication field.
Summary of the invention
Technical problem to be solved by this invention provides a kind of Yb dosed optical fiber that utilizes as gain media, works in lower repetition rate (hertz magnitude), the pulse of peak power watt level can be amplified to a kind of pulse fiber amplifier of multikilowatt.
For addressing the above problem, a kind of pulse fiber amplifier that the present invention is designed mainly is made of preamplifier stage, the main barrier assembly of putting level and being connected between the two-stage, wherein:
Preamplifier stage comprises optical fiber circulator, optical fiber filter, puts Yb dosed optical fiber, wavelength division multiplexer, fiber reflector and 980nm pump laser in advance; 3 ports of optical fiber circulator connect signal input optical fibre, optical fiber filter and barrier assembly respectively; Optical fiber filter links to each other with the common port of wavelength division multiplexer via putting Yb dosed optical fiber in advance, and 2 multiplexing ends of wavelength division multiplexer then connect fiber reflector and 980nm pump laser respectively;
Barrier assembly comprises fibre optic isolater and electro-optical shutter; The two ends of fibre optic isolater connect the incident end of optical fiber circulator and electro-optical shutter respectively; The exit end of electro-optical shutter links to each other with the main level of putting;
The main level of putting comprises mould field adapter, multimode pumping coupler, main Yb dosed optical fiber, pumping protection filter and the 915nm multimode pump laser put; The two ends of mould field adapter connect one of them incident end of electro-optical shutter and multimode pumping coupler respectively; 915nm multimode pump laser is connected to another incident end of multimode pumping coupler via the pumping protection filter; The exit end of multimode pumping coupler connects the signal output optical fibre.
The described Yb dosed optical fiber of putting in advance of such scheme is the single-mode ytterbium-doping optical fiber of absorption coefficient between 200B/m～300dB/m, and it is the double clad Yb dosed optical fiber of core diameter between 10um～25um that the master is put Yb dosed optical fiber.
The described wavelength division multiplexer of such scheme is that operation wavelength is the wavelength division multiplexer of 980nm and 1053nm.
The described fiber reflector of such scheme is that centre wavelength is the fiber reflector of 1053nm.
The bandwidth of the described optical fiber filter of such scheme is 15nm.
Compared with prior art, the present invention adopts Yb dosed optical fiber as gain media on the whole, and the two-stage structure for amplifying that cooperates " put in advance+lead and put " provides pumping efficiency and reduces noise, and the adding barrier assembly reduces noise and nonlinear effect between the two poles of the earth, thereby make the present invention can work in lower repetition rate (hertz magnitude), and the pulse of peak power watt level can be amplified to multikilowatt; In addition, the present invention also adopts full optical fiber, all solid stateization structure, makes that its overall structure is compacter, performance is also stable, and this also allows the present invention more be applicable to the research field of low-repetition-frequency, high-power pulse amplification aspect.
Description of drawings
Fig. 1 is the light path principle figure of a kind of pulse fiber amplifier of the present invention.
Number in the figure:
1, preamplifier stage; 1-1, optical fiber circulator; 1-2, optical fiber filter; 1-3, put Yb dosed optical fiber in advance; 1-4, wavelength division multiplexer; 1-5, fiber reflector; 1-6,980nm pump laser;
2, barrier assembly; 2-1, fibre optic isolater; 2-2, electro-optical shutter;
3, the main level of putting; 3-1, mould field adapter; 3-2, multimode pumping coupler; 3-3, the main Yb dosed optical fiber of putting; 3-4, pumping protection filter; 3-5,915nm multimode pump laser.
Embodiment
Referring to Fig. 1, a kind of pulse fiber amplifier of the present invention mainly is made of preamplifier stage 1, the main barrier assembly 2 of putting level 3 and being connected between the two-stage.Wherein:
Preamplifier stage 1 comprises optical fiber circulator 1-1, optical fiber filter 1-2, puts Yb dosed optical fiber 1-3, wavelength division multiplexer 1-4, fiber reflector 1-5 and 980nm pump laser 1-6 in advance.3 ports of optical fiber circulator 1-1 connect signal input optical fibre, optical fiber filter 1-2 and barrier assembly 2 respectively.Optical fiber filter 1-2 links to each other via putting the common port of Yb dosed optical fiber 1-3 with wavelength division multiplexer 1-4 in advance, and 2 multiplexing ends of wavelength division multiplexer 1-4 then connect fiber reflector 1-5 and 980nm pump laser 1-6 respectively.Preamplifier stage 1 adopts highly doped single-mode ytterbium-doping optical fiber as gain media, between its absorption coefficient 200B/m～300dB/m.In the preferred embodiment of the present invention, the described absorption coefficient 250dB/m of putting Yb dosed optical fiber 1-3 in advance.In addition, in the preferred embodiment of the present invention, the bandwidth of selected optical fiber filter 1-2 is 15nm; Wavelength division multiplexer 1-4 is that operation wavelength is the wavelength division multiplexer 1-4 of 980nm and 1053nm; Fiber reflector 1-5 is that centre wavelength is the fiber reflector 1-5 of 1053nm.Before the master is put level 3, add preamplifier stage 1 and carry out the round trip amplification, can effectively improve pumping efficiency and minimizing noise.
Barrier assembly 2 is in order to reduce noise and the various nonlinear effects of reduction, and it comprises fibre optic isolater 2-1 and electro-optical shutter 2-2.The two ends of fibre optic isolater 2-1 connect the incident end of optical fiber circulator 1-1 and electro-optical shutter 2-2 respectively; The exit end of electro-optical shutter 2-2 links to each other with the main level 3 of putting.Fibre optic isolater 2-1 can filter the frequency domain noise, and electrooptical shutter comes synchronously by the signal of telecommunication with the main 980nm pump laser 1-6 of putting level 3, mainly like this puts grades 3 and can carry out pulse pump and reduce the time domain noise.
The main level 3 of putting comprises mould field adapter 3-1, multimode pumping coupler 3-2, main Yb dosed optical fiber 3-3, pumping protection filter 3-4 and the 915nm multimode pump laser 3-5 put; The two ends of mould field adapter 3-1 connect one of them incident end of electro-optical shutter 2-2 and multimode pumping coupler 3-2 respectively; 915nm multimode pump laser 3-5 is connected to another incident end of multimode pumping coupler 3-2 via pumping protection filter 3-4; The exit end of multimode pumping coupler 3-2 connects the signal output optical fibre.The main level 3 of putting adopts big core diameter double clad Yb dosed optical fiber as gain media, and its core diameter is between 10um～25um.In the preferred embodiment of the present invention, the core diameter that described master is put Yb dosed optical fiber 3-3 is 10um.The master is put level 3 and had both been guaranteed that enough gains obtained high power pulse like this, can guarantee the single mode output of pulse laser again, thereby reach the purpose that obtains the single mode pulse of low-repetition-frequency, high-peak power after amplifying.
Operation principle of the present invention is as follows:
Low repetition pulse signal to be amplified is delivered to put in advance among the Yb dosed optical fiber 1-3 by the bandwidth optical fiber filter 1-2 that is 15nm and is amplified after optical fiber circulator 1-1 input.Amplified pulse signal is fiber reflector 1-5 reflection the carrying out secondary amplification of 1053nm by centre wavelength behind the wavelength division multiplexer 1-4 of 980/1053nm.Meanwhile, 980nm pump laser 1-6 while makeup energy is to wavelength division multiplexer 1-4.Export in the barrier assembly 2 by optical fiber circulator 1-1 through the secondary amplified pulse signal at last.
The optical isolator of barrier assembly 2 makes the pulse one-way transmission, to eliminate main influence of putting the back scattering of level 3 to preamplifier stage 1, reaches part frequency domain noise.Electrooptical shutter then can be eliminated the time domain noise.
Main put mould field adapter 3-1 in the level 3 with general single mode fiber with large core fiber is low-loss couples together, to avoid the directly huge loss of welding.Deliver among the multimode pumping coupler 3-2 behind the pump light process pumping protection filter 3-4 that 915nm multimode pump laser 3-5 produces.This pumping protection filter 3-4 is used to protect powerful 915nm multimode pump laser 3-5, prevents that the back scattering that nonlinear effect causes from breaking pump laser.915nm multimode pump laser 3-5 then is a pulse pump, and together carries out synchronously with signal pulse with electro-optical shutter 2-2, thereby reduces the time domain noise of amplifier under the low repetition condition of work.High-power multimode pumping coupler 3-2 is coupled into main putting with above-mentioned high-power pump light and amplifies back output among the Yb dosed optical fiber 3-3.
Claims (5)
1. pulse fiber amplifier is characterized in that: mainly constitutes by preamplifier stage (1), the main barrier assembly (2) of putting level (3) and being connected between the two-stage, wherein:
Preamplifier stage (1) comprises optical fiber circulator (1-1), optical fiber filter (1-2), puts Yb dosed optical fiber (1-3), wavelength division multiplexer (1-4), fiber reflector (1-5) and 980nm pump laser (1-6) in advance; 3 ports of optical fiber circulator (1-1) connect signal input optical fibre, optical fiber filter (1-2) and barrier assembly (2) respectively; Optical fiber filter (1-2) links to each other via putting the common port of Yb dosed optical fiber (1-3) with wavelength division multiplexer (1-4) in advance, and 2 multiplexing ends of wavelength division multiplexer (1-4) then connect fiber reflector (1-5) and 980nm pump laser (1-6) respectively;
Barrier assembly (2) comprises fibre optic isolater (2-1) and electro-optical shutter (2-2); The two ends of fibre optic isolater (2-1) connect the incident end of optical fiber circulator (1-1) and electro-optical shutter (2-2) respectively; The exit end of electro-optical shutter (2-2) links to each other with the main level (3) of putting;
The main level (3) of putting comprises mould field adapter (3-1), multimode pumping coupler (3-2), main Yb dosed optical fiber (3-3), pumping protection filter (3-4) and the 915nm multimode pump laser (3-5) put; The two ends of mould field adapter (3-1) connect one of them incident end of electro-optical shutter (2-2) and multimode pumping coupler (3-2) respectively; 915nm multimode pump laser (3-5) is connected to another incident end of multimode pumping coupler (3-2) via pumping protection filter (3-4); The exit end of multimode pumping coupler (3-2) connects the signal output optical fibre.
2. a kind of pulse fiber amplifier according to claim 1, it is characterized in that: put Yb dosed optical fiber (1-3) in advance and be the single-mode ytterbium-doping optical fiber between absorption coefficient 200B/m～300dB/m, it is the double clad Yb dosed optical fiber of core diameter between 10um～25um that the master is put Yb dosed optical fiber (3-3).
3. a kind of pulse fiber amplifier according to claim 1 and 2 is characterized in that: wavelength division multiplexer (1-4) is the wavelength division multiplexer (1-4) of 980nm and 1053nm for operation wavelength.
4. a kind of pulse fiber amplifier according to claim 3 is characterized in that: fiber reflector (1-5) is the fiber reflector (1-5) of 1053nm for centre wavelength.
5. a kind of pulse fiber amplifier according to claim 1 and 2 is characterized in that: the bandwidth of optical fiber filter (1-2) is 15nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101882212A CN102280803A (en) | 2011-07-06 | 2011-07-06 | Pulse fiber amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101882212A CN102280803A (en) | 2011-07-06 | 2011-07-06 | Pulse fiber amplifier |
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| CN102280803A true CN102280803A (en) | 2011-12-14 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368048A (en) * | 2013-07-23 | 2013-10-23 | 上海交通大学 | High gain and high signal-to-noise ratio type polarization maintaining optical fiber amplifying system |
| CN105914567A (en) * | 2016-05-11 | 2016-08-31 | 深圳市杰普特光电股份有限公司 | Fiber laser device |
| CN106058629A (en) * | 2016-07-22 | 2016-10-26 | 中国电子科技集团公司第三十四研究所 | Closed-ring feedback control fiber amplifier and feedback control method thereof |
| CN107764514A (en) * | 2016-08-22 | 2018-03-06 | 南京理工大学 | A kind of low reflective grid reflectivity device for accurately measuring of high-capacity optical fiber laser |
| WO2019047900A1 (en) * | 2017-09-06 | 2019-03-14 | Itf Technologies Inc. | Micro-optical bench architecture for master oscillator power amplifier (mopa) |
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| CN101478111A (en) * | 2009-01-19 | 2009-07-08 | 华东师范大学 | Process for generating low repeat frequency ultra-short laser pulse |
| CN101826696A (en) * | 2009-03-02 | 2010-09-08 | 北京大学 | High-energy low-repetition-frequency fiber laser |
| CN202183550U (en) * | 2011-07-06 | 2012-04-04 | 中国电子科技集团公司第三十四研究所 | Pulse optical fiber amplifier |
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2011
- 2011-07-06 CN CN2011101882212A patent/CN102280803A/en active Pending
Patent Citations (3)
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| CN101478111A (en) * | 2009-01-19 | 2009-07-08 | 华东师范大学 | Process for generating low repeat frequency ultra-short laser pulse |
| CN101826696A (en) * | 2009-03-02 | 2010-09-08 | 北京大学 | High-energy low-repetition-frequency fiber laser |
| CN202183550U (en) * | 2011-07-06 | 2012-04-04 | 中国电子科技集团公司第三十四研究所 | Pulse optical fiber amplifier |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368048A (en) * | 2013-07-23 | 2013-10-23 | 上海交通大学 | High gain and high signal-to-noise ratio type polarization maintaining optical fiber amplifying system |
| CN105914567A (en) * | 2016-05-11 | 2016-08-31 | 深圳市杰普特光电股份有限公司 | Fiber laser device |
| CN106058629A (en) * | 2016-07-22 | 2016-10-26 | 中国电子科技集团公司第三十四研究所 | Closed-ring feedback control fiber amplifier and feedback control method thereof |
| CN106058629B (en) * | 2016-07-22 | 2022-01-25 | 中国电子科技集团公司第三十四研究所 | Closed-loop feedback control optical fiber amplifier and feedback control method thereof |
| CN107764514A (en) * | 2016-08-22 | 2018-03-06 | 南京理工大学 | A kind of low reflective grid reflectivity device for accurately measuring of high-capacity optical fiber laser |
| WO2019047900A1 (en) * | 2017-09-06 | 2019-03-14 | Itf Technologies Inc. | Micro-optical bench architecture for master oscillator power amplifier (mopa) |
| CN111226168A (en) * | 2017-09-06 | 2020-06-02 | Itf科技公司 | Micro optical bench structure of master control oscillation power amplifier and laser system |
| US11387619B2 (en) | 2017-09-06 | 2022-07-12 | Itf Technologies Inc. | Micro-optical bench architecture for master oscillator power amplifier (MOPA) |
| CN111226168B (en) * | 2017-09-06 | 2023-04-28 | Itf科技公司 | Micro-optical bench structure of master control oscillation power amplifier and laser system |
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Application publication date: 20111214 |