CN202512332U - Full-optical fiber ultrashort laser pulse amplifier - Google Patents
Full-optical fiber ultrashort laser pulse amplifier Download PDFInfo
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- CN202512332U CN202512332U CN2012200902740U CN201220090274U CN202512332U CN 202512332 U CN202512332 U CN 202512332U CN 2012200902740 U CN2012200902740 U CN 2012200902740U CN 201220090274 U CN201220090274 U CN 201220090274U CN 202512332 U CN202512332 U CN 202512332U
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Abstract
The utility model discloses a full-optical fiber ultrashort laser pulse amplifier, which comprises an ultrashort pulse seed signal source, an optical fiber isolator and at least one level of optical fiber power amplifier, wherein the laser output end of the ultrashort pulse seed signal source is connected with optical fibers at the input end of the optical fiber isolator by optical fiber welding; and optical fibers at the output end of the optical fiber isolator are connected with optical fibers at the input end of a first-level optical fiber power amplifier by welding. The full-optical fiber ultrashort laser pulse amplifier is characterized in that the optical fiber power amplifier is formed by connecting a pumping laser module and laser power gain optical fibers; the pumping laser module comprises a laser pumping light source and a pumping/signal laser beam combiner; and the laser gain optical fibers are short-length and high-ytterbium doping concentration silicate glass optical fibers, and the lengths of the laser gain optical fibers are less than or equal to 0.95 meter. The full-optical fiber ultrashort laser pulse amplifier has the advantages of simple design, low manufacturing cost, high reliability and the like, and is a full-optical fiber ultrashort-pulse and high-power laser amplifier which has practical value.
Description
Technical field
The utility model relates to a kind of optical fiber high power laser light amplifier; Particularly relate to the fiber amplifier of a kind of full optical fiber that adopts the high ytterbium doping content of short length silicate glass optical fiber, ultrashort laser pulse, high-average power (output peak value of pulse laser power is greater than 10 kW), belong to laser technology and optical information technical field.
Background technology
Macro-energy (high-average power), have psec femtosecond pulse width, peak value of pulse laser power greater than the full fiber-optical ultrashort pulse LASER Light Source of 10 kW since its high-level efficiency, portability, high reliability and high stability in the accurate mark of material with instrument, device, industry such as laser accurate micromachined and life science and biotechnology and measurement and scientific research field have ten minutes application widely.
Traditional ultra-short pulse laser light source adopts solid state laser gain medium such as titanium-doped sapphire etc. usually; Because its lower efficient, expensive cost, poor long-time stability and reliability; Need the complicated effects limit such as maintenance of professional and technical personnel, the large-scale application in fields such as industry receives certain limitation.And macro-energy, high-average power, have the full fiber-optical ultrashort pulse LASER Light Source of psec femtosecond pulse width because its high-level efficiency, portable, high reliability and high stable are that the large-scale application of ultra-short pulse laser light source in fields such as industry provides a kind of possibility.The full fiber-optical ultrashort pulse LASER Light Source of existing psec femtosecond pulse width adopts little energy (low-power) ultrashort pulse seed laser light source to add the technology path that the pulse fiber power amplifier amplifies usually; Because ultrashort pulse high-power fiber amplifier unintentional nonlinearity effect is (like Ramam effect; From phase modulation (PM) etc.) and the restriction of the amplifying fiber peak value breakdown power limit, need usually to adopt some complicated technology to reduce the peak power of laser pulse in the optical fiber amplification process of amplification.According to the nonlinear optical fiber optical theory; The mould field xsect relation of being inversely proportional to of the intensity of nonlinear effect and optical fiber in the optical fiber, and proportional with the length of fiber medium (referring to G.P. Agrawal, Nonlinear Fiber Optics; Second Edition, 1995).In order to reduce or reduce the influence of nonlinear effect to ultrashort laser pulse optical fiber amplification process; Usually the mode field diameter that adopts the light pulse peak power that reduces in the light pulse amplification process (amplifying like the chirped pulse of time domain broadening seed laser pulse is the CPA technology) or under the prerequisite that keeps amplifying laser pulsed light beam quality, increase the gain amplifying fiber as far as possible is to reduce power density in the gain fibre (as adopting big mould field rare earth doped optical fibre; The rare earth doped photonic crystal fiber in big mould field; Gain medias such as bar-shaped rare earth doped photonic crystal fiber); But because the restriction of doping content; The gain amplifier fiber medium needs long to obtain enough gains and output power, and the cost of these special optical fibers is also relatively more expensive in addition.
Summary of the invention
The goal of the invention of the utility model provides a kind of full optical fiber ultrashort laser pulse amplifier; To overcome the breakdown power restriction of nonlinear effect and optical fiber in the high power laser light optical fiber amplification process, obtain the output of enough laser gains and peak value of pulse laser power simultaneously greater than 10 kW.
For reaching the foregoing invention purpose; The technical scheme that the utility model adopts is: a kind of full optical fiber ultrashort laser pulse amplifier; Comprise ultrashort pulse seed signal source, fibre optic isolater and one-level fiber optic power amplifier at least; The laser output in ultrashort pulse seed signal source is connected through fused fiber splice with the input end fiber of fibre optic isolater; The output terminal optical fiber of fibre optic isolater is connected through welding with the input end fiber of first order fiber optic power amplifier, and said fiber optic power amplifier is connected and composed by pumping laser module and laser power gain fibre, and said pumping laser module comprises laser pumping light source, pumping/signal laser bundling device; Said laser gain optical fiber is the silicate glass optical fiber of the high ytterbium doping content of short length, and the laser gain fiber lengths is smaller or equal to 0.95 meter.
In the technique scheme, seed laser can be to utilize mode-locking technique to produce the fiber laser or the solid state laser of ultrashort laser pulse, also can be the ultra-short pulse laser that utilizes the direct modulation phase of current impulse to answer long wavelength semiconductor laser to produce.Seed laser produces the seed laser of the seed laser pulse of ultrashort pulse as follow-up high-power fiber amplifier; Fibre optic isolater is used to stop the back-reflection light that follow-up high-power fiber amplifier produces (like the flashlight of reflection and amplified spontaneous emission light dorsad); With protection prime seed laser; Pumping/signal laser optical-fiber bundling device is coupled into same amplifying fiber with pumping laser and seed laser signal, and the high ytterbium doping content of short length silicate glass optical fiber absorptive pumping laser produces laser gain in the signal laser wavelength.Laser gain optical fiber adopts ytterbium (Yb
3+) doping content be greater than 2% to 30% (by weight) silicate glass optical fiber, can be inclined to one side single covering, double clad, the multi-clad structure of the inclined to one side or non-guarantor of guarantor of single mode, big mould field single mode, the peak laser power of generation is greater than 10 kW.
Further technical scheme is provided with the said fiber optic power amplifier of two-stage, is provided with second fibre optic isolater between the two-stage fiber optic power amplifier.Each grade fiber optic power amplifier is connected and composed by a pumping laser module and a laser power gain fibre respectively.
In the technique scheme, the laser pulse width in said ultrashort pulse seed signal source arrives the femtosecond magnitude in psec.Generally be employed in the certain wave strong point as 1.03 microns, 1.06 microns etc. laser pulse.
In the technique scheme, said laser gain fiber lengths is 0.05 meter～0.95 meter.
In technique scheme; The full fiber-optical ultrashort pulse amplifier of high power can be according to the different mining of seed laser power with the high ytterbium doping content silicate glass optical fiber of different length as laser amplification medium; The multi-stage fiber amplifier structure is adopted in requirement according to different output power (single pulse energy), but general plotting all belongs to technique scheme.
The full fiber-optical ultrashort pulse amplifier architecture of the high power that specifically can adopt is listed below:
Wavelength is that the ultrashort pulse seed laser of 1.03 microns or 1.06 microns is connected through fused fiber splice with the input end fiber of a fibre optic isolater; The laser pulse of seed laser output is as the input seed laser pulse of high-power fiber amplifier; Fibre optic isolater is used to stop the back-reflection light that follow-up high-power fiber amplifier produces (like the flashlight of reflection and amplified spontaneous emission light dorsad), to protect the prime seed laser;
The semiconductor laser pumping light source of an optical fiber coupling is connected through welding with the pumping laser input end fiber of pumping/signal laser bundling device, as input pumping light, for high-power fiber amplifier provides pumping laser;
The output terminal optical fiber of fibre optic isolater is connected through welding with the signal laser input end fiber of pumping/signal laser bundling device, as high-power fiber amplifier input signal laser;
High ytterbium (the Yb of one section short length (length less than 0.95 meter, can from 0.05 meter to 0.95 meter)
3+) end of doping content silicate glass optical fiber is connected through welding with the pump signal laser output optical fiber of pumping/signal laser bundling device, mixes ytterbium (Yb
3+) produce the laser gain of signal laser wavelength behind the rare earth gain glass optical fiber absorptive pumping laser; High ytterbium (the Yb of short length
3+) laser after the other end output of doping content silicate glass optical fiber is amplified, or as the input seed laser of next stage high-power fiber amplifier.
Because the technique scheme utilization, the utility model compared with prior art has advantage:
1. the utility model adopts the high ytterbium (Yb of the short length of full optical fiber
3+) doping content silicate glass optical fiber is as amplification medium; Need not to adopt the chirped pulse amplification of complicated time domain broadening seed laser pulse is the CPA technology; Make the system architecture of the full fiber-optical ultrashort pulse amplifier of whole high power greatly simplify, reliability and stability improve greatly;
2. the full fiber-optical ultrashort pulse amplifier system of high power cost is more cheap.Because system uses the high ytterbium (Yb of short length as much as possible under the prerequisite that keeps amplifying laser pulsed light beam quality
3+) doping content silicate glass optical fiber is as amplification medium; Do not adopt common big mould field rare earth doped optical fibre; The rare earth doped photonic crystal fiber in big mould field; The gain media that bar-shaped rare earth doped photonic crystal fiber etc. are expensive makes that the full fiber-optical ultrashort pulse amplifier system of this patent high power cost is more cheap.
Description of drawings
Fig. 1 is the full optical fiber ultrashort laser pulse amplifier architecture synoptic diagram of the utility model embodiment one.
Fig. 2 is the full optical fiber ultrashort laser pulse amplifier architecture synoptic diagram of the utility model embodiment two.
Wherein: 1, ultrashort pulse seed laser; 2, full fibre optic isolater; 3, the feedback laser dog catch of full fibre optic isolater; 4, the forward direction laser watch-dog of full fibre optic isolater; 5, pumping/signal bundling device; 601,602, pump laser; 7, laser gain optical fiber; 8, the full fibre optic isolater in the second level; 9, the feedback laser dog catch of the full fibre optic isolater in the second level; 10, the forward direction laser watch-dog of the full fibre optic isolater in the second level; 11, second pumping/signal bundling device; 121,122, second level pump laser; 13, second level laser gain optical fiber.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Embodiment one: as shown in Figure 1; Wavelength is that the ultra-short pulse laser of ultrashort pulse seed laser 1 output of 1.03 microns or 1.06 microns is connected through fused fiber splice with the input end fiber of a full fibre optic isolater 2, and said full fibre optic isolater has feedback laser dog catch 3 and forward direction laser watch-dog 4; The laser pulse of seed laser 1 output is as the input seed laser pulse of high-power fiber amplifier; Full fibre optic isolater 2 is used to stop the back-reflection light that follow-up high-power fiber amplifier produces (like the flashlight of reflection and amplified spontaneous emission light dorsad), to protect prime ultrashort pulse seed laser 1;
The semiconductor pump laser 601,602 of optical fiber coupling is connected through welding with the pumping laser input end fiber of pumping/signal laser bundling device 5, as input pumping light, for high-power fiber amplifier provides pumping laser;
The output terminal optical fiber of full fibre optic isolater 2 is connected through welding with the signal laser input end fiber of pumping/signal bundling device 5, as high-power fiber amplifier input signal laser;
High ytterbium (the Yb of one section short length (fiber lengths less than 0.95 meter, can from 0.05 meter to 0.95 meter)
3+) end of doping content silicate glass optical fiber (laser gain optical fiber 7) is connected through welding with the pump signal laser output optical fiber of pumping/signal bundling device 5, the high ytterbium (Yb of short length
3+) produce the laser gain of signal laser wavelength behind the doping content silicate glass optical fiber absorptive pumping laser; High ytterbium (the Yb of short length
3+) laser after the other end output of doping content silicate glass optical fiber is amplified.
Embodiment two: as shown in Figure 2, a kind of full optical fiber ultrashort laser pulse amplifier comprises ultrashort pulse seed signal source, fibre optic isolater and two-stage fiber optic power amplifier.The structure of wherein, ultrashort pulse seed signal source, fibre optic isolater and first order fiber optic power amplifier 501 is identical with embodiment one.The output terminal of the high ytterbium doping content of short length silicate glass optical fiber is provided with the full fibre optic isolater 8 in the second level as the input seed laser of second level fiber optic power amplifier 111 between the two-stage fiber optic power amplifier.
The signal laser input end fiber of the output terminal optical fiber of the full fibre optic isolater 8 in second level pumping with the second level/signal bundling device 11 is connected through welding, as second level high-power fiber amplifier input signal laser;
The pumping laser input end fiber of second level pump laser 121,122 pumping with the second level/signal bundling device 11 of optical fiber coupling is connected through welding, as input pumping light; (fiber lengths is less than 0.95 meter for one section short length; Can be from 0.05 meter to 0.95 meter) the pump signal laser output optical fiber of end pumping with the second level/signal bundling device 11 of high ytterbium doping content silicate glass optical fiber (second level laser gain optical fiber 13) is connected through welding, produces the laser gain of signal laser wavelength behind the high ytterbium doping content of the short length silicate glass optical fiber 13 absorptive pumping laser; Laser pulse after the other end output of the high ytterbium doping content of short length silicate glass optical fiber 13 is amplified, or as the input seed laser of next stage high-power fiber amplifier, the peak laser power of generation is greater than 10 kW.
Claims (4)
1. full optical fiber ultrashort laser pulse amplifier; Comprise ultrashort pulse seed signal source, fibre optic isolater and one-level fiber optic power amplifier at least; The laser output in ultrashort pulse seed signal source is connected through fused fiber splice with the input end fiber of fibre optic isolater; The output terminal optical fiber of fibre optic isolater is connected through welding with the input end fiber of first order fiber optic power amplifier; It is characterized in that: said fiber optic power amplifier is connected and composed by pumping laser module and laser power gain fibre; Said pumping laser module comprises laser pumping light source, pumping/signal laser bundling device, and said laser gain optical fiber is the silicate glass optical fiber of the high ytterbium doping content of short length, and the laser gain fiber lengths is smaller or equal to 0.95 meter.
2. full optical fiber ultrashort laser pulse amplifier according to claim 1 is characterized in that: be provided with the said fiber optic power amplifier of two-stage, be provided with second fibre optic isolater between the two-stage fiber optic power amplifier.
3. full optical fiber ultrashort laser pulse amplifier according to claim 1 is characterized in that: the laser pulse width in said ultrashort pulse seed signal source arrives the femtosecond magnitude in psec.
4. full optical fiber ultrashort laser pulse amplifier according to claim 1 is characterized in that: said laser gain fiber lengths is 0.05 meter～0.95 meter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012200902740U CN202512332U (en) | 2012-03-12 | 2012-03-12 | Full-optical fiber ultrashort laser pulse amplifier |
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| CN2012200902740U CN202512332U (en) | 2012-03-12 | 2012-03-12 | Full-optical fiber ultrashort laser pulse amplifier |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208728A (en) * | 2013-04-22 | 2013-07-17 | 山东海富光子科技股份有限公司 | High-power pulse per second type ytterbium-doped all-fiber laser system |
| CN103280691A (en) * | 2013-06-05 | 2013-09-04 | 苏州图森激光有限公司 | High-power laser optical fiber amplifier |
| CN104375355A (en) * | 2013-08-12 | 2015-02-25 | 高值光电股份有限公司 | Fiber-amplifiers with all-fiber optical isolator |
| CN105634611A (en) * | 2016-01-08 | 2016-06-01 | 华为技术有限公司 | Optical module and signal processing method |
| CN107591671A (en) * | 2016-07-08 | 2018-01-16 | 国神光电科技（上海）有限公司 | Reduce the method and optical assembly and optical fibre device of optical fibre device nonlinear effect |
| CN109075522A (en) * | 2016-03-24 | 2018-12-21 | 通快激光有限责任公司 | Ultrashort pulse fiber pre-amplifier system for big core fibre |
| CN110564937A (en) * | 2015-01-09 | 2019-12-13 | Lsp技术有限公司 | Method and apparatus for use in laser shock peening |
| WO2024169243A1 (en) * | 2023-02-13 | 2024-08-22 | 深圳大学 | Method for obtaining mid-infrared ultrashort pulse laser light, and laser |
-
2012
- 2012-03-12 CN CN2012200902740U patent/CN202512332U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208728A (en) * | 2013-04-22 | 2013-07-17 | 山东海富光子科技股份有限公司 | High-power pulse per second type ytterbium-doped all-fiber laser system |
| CN103280691A (en) * | 2013-06-05 | 2013-09-04 | 苏州图森激光有限公司 | High-power laser optical fiber amplifier |
| CN104375355A (en) * | 2013-08-12 | 2015-02-25 | 高值光电股份有限公司 | Fiber-amplifiers with all-fiber optical isolator |
| CN110564937A (en) * | 2015-01-09 | 2019-12-13 | Lsp技术有限公司 | Method and apparatus for use in laser shock peening |
| CN105634611A (en) * | 2016-01-08 | 2016-06-01 | 华为技术有限公司 | Optical module and signal processing method |
| CN109075522A (en) * | 2016-03-24 | 2018-12-21 | 通快激光有限责任公司 | Ultrashort pulse fiber pre-amplifier system for big core fibre |
| CN109075522B (en) * | 2016-03-24 | 2022-01-14 | 通快激光有限责任公司 | Ultrashort pulse optical fiber preamplifier system for large-core optical fiber |
| CN107591671A (en) * | 2016-07-08 | 2018-01-16 | 国神光电科技（上海）有限公司 | Reduce the method and optical assembly and optical fibre device of optical fibre device nonlinear effect |
| WO2024169243A1 (en) * | 2023-02-13 | 2024-08-22 | 深圳大学 | Method for obtaining mid-infrared ultrashort pulse laser light, and laser |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20200109 Address after: 311400 Hangzhou, Fuyang, Zhejiang province 9 Yin Hu Street, No. 9, No. 6, thirteen, floor 1317, innovation center. Patentee after: Hangzhou Silver Lake Laser Technology Co., Ltd. Address before: 215011 No. 209 Chuk Yuen Road, Suzhou New District, Jiangsu, Suzhou, China Patentee before: Suzhou Tusen Laser Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121031 |