CN103794981A - High energy hybrid thulium-doped pulse laser single-frequency amplifier - Google Patents
High energy hybrid thulium-doped pulse laser single-frequency amplifier Download PDFInfo
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- CN103794981A CN103794981A CN201410040946.0A CN201410040946A CN103794981A CN 103794981 A CN103794981 A CN 103794981A CN 201410040946 A CN201410040946 A CN 201410040946A CN 103794981 A CN103794981 A CN 103794981A
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Abstract
The invention discloses a high energy hybrid thulium-doped pulse laser single-frequency amplifier which comprises a seed resource, a wavelength division multiplexer, an optical fiber pumping source, a polarization-maintaining single-mode single-cladding thulium-doped optical fiber, an isolator, a beam splitter, an output end, a filter, an acoustic optical modulator, a semiconductor pumping source and a laser crystal. The high energy hybrid thulium-doped pulse laser single-frequency amplifier has the advantages of being simple in structure and stable in system, the optical fiber-solid combined method is used, optical fiber amplification is adopted for a prime stage, the capacity for amplifying small signals is effectively improved, crystal amplification is adopted for a post stage, the advantage that solid lasers are prone to generating low-multi-pulse pulsed light is developed, the nonlinear effect easily occurring in optical fiber amplifying under high power is effectively avoided, low-multi-pulse high-energy pulse output is accordingly achieved, and the good application aspect is achieved.
Description
Technical field
The present invention relates to mix thulium laser amplifier, particularly the hybrid thulium pulse laser single frequency amplifier device of mixing of a kind of high-energy.
Background technology
Thulium-doped fiber laser wave-length coverage is positioned at hydrone absworption peak, there is the feature to eye-safe, be with a wide range of applications and application prospect at aspects such as operation, remote sensing, industrial processes, atmosphere optical communications, particularly the demand of the output to high-energy single-frequency laser seems more urgent.Be continuous wave output and mix at present thulium laser, amplifier most, the laser report of relevant pulse output is little.Q-peak company has reported the thulium-doped fiber laser that exceedes 1kW, single-frequency output has also reached 608W continuously, but power density and the peak power of thulium-doped fiber laser are still lower continuously, if from the angle of practical application, the thulium-doped fiber laser of pulsed operation is more with practical value, and therefore the output of high-energy single-frequency laser becomes an important development trend.At present, a few pulses output to mix thulium laser output linewidth wider, output energy is lower, the single-frequency that NP Photonics builds is mixed thulium full-optical-fiber laser and is realized single pulse energy 220 μ J Laser outputs, is the peak of all optical fibre structure single-frequency output at present.But the hybrid thulium pulse laser single frequency amplifier device of mixing of relevant 2 μ m does not also have relevant report.
Summary of the invention
The object of the invention is to for application demand, propose the hybrid thulium pulse amplifier of mixing of a kind of high-energy, this amplifier can be realized high-energy, low repetition, single-frequency laser output, has compact conformation, good stability and practical feature.
Technical solution of the present invention is:
The hybrid thulium pulse laser single frequency amplifier device of mixing of a kind of high-energy, feature is that its formation comprises: seed source, wavelength division multiplexer, pumped fiber source, bais single-mode list covering thulium doped fiber, isolator, beam splitter, output, filter, acousto-optic modulator, semiconductor pumping sources and laser crystal, the continuous seed laser of described seed source output enters described bais single-mode list covering thulium doped fiber through described wavelength division multiplexer, the pump light of described pumped fiber source output enters after described bais single-mode list covering thulium doped fiber amplifies described seed laser and is divided into two parts by described beam splitter through described wavelength division multiplexer: a part is through described output output, another part through filter and acousto-optic modulator laggard enter described laser crystal, the pump light of described semiconductor pumping sources output injects described laser crystal and carries out solid amplification, described pumping source, the power of semiconductor pumping sources is continuously adjustable.
Described seed source is the solid state laser with the continuous linear cavity configuration of better single-frequency characteristic, and line width, stability are high, and have certain tunable wave length.
Described pumped fiber source is the erbium-ytterbium co-doped fiber laser of single mode all optical fibre structure, its output wavelength 1550nm, and power output is up to 1.8W.
The spatial light of described seed source output is entered in monomode fiber by coupled lens system, coupled.Described seed source adopts the solid state laser of the continuous linear cavity configuration with better single-frequency characteristic, and line width, stability are high, and have certain tunable wave length.
Described seed source can be realized continuous single-frequency 100mW laser stabilization output, and Output of laser live width is less than 70MHz, and wavelength 2051nm～2057nm is tunable, and output spectrum as shown in Figure 3.The Free Spectral Range (FSR) of testing scanning interferometer used is 3.75GHz, so the unimodal width of signal is about 70MHz as shown in Figure 2, this is the magnitude of the filtering bandwidth of scanning interferometer own just.The breadth of spectrum line that can estimate accordingly seed laser will be less than 70MHz.
Described gain fibre is bais single-mode list covering thulium doped fiber, has higher absorption coefficient.
Described pumped fiber source is that wavelength is single mode all optical fibre structure erbium-ytterbium co-doped fiber laser, and output wavelength 1550nm adopts with the mode pumping gain fibre with pumping.
Described laser crystal is that thulium holmium is mixed laser crystal altogether, and the logical light face of its crystal is coated with anti-reflection film, and output coupling mirror is thoroughly high to pump light wavelength, and optical maser wavelength part is reflected.
Operation principle of the present invention is:
Described hybrid amplifier is mainly by seed source, and fiber amplifier part and crystal amplifier section three parts form.The space laser of single-frequency seed source output is coupled in wavelength division multiplexer signal fibre by beam coupler, erbium-ytterbium co-doped fiber laser is fine being connected of pumping with wavelength division multiplexer as pumping source, with band pumping thulium doped fiber, the pulsed light that is low repetition by acousto-optic modulator copped wave through the continuous light of fiber amplifier, there is certain magnitude amplifying signal light and utilize traditional crystal amplification mode to obtain further amplification, thereby realize high-energy, low repetition, single-frequency laser pulse output.
The present invention compared with prior art has the following advantages:
The present invention adopts typical MOPA structure for amplifying, adopts the amplification mode of optical fiber-solid-phase combination, can effectively improve laser output power, thereby obtain the Laser output of high single pulse energy, high light beam quality.The spectral characteristic of amplifier output depends primarily on the spectral characteristic of seed source.Seed source adopts the solid state laser of continuous linear cavity configuration with better single-frequency characteristic, power output 100mW, and line width, stability are high, and have certain tunable wave length.Amplifying stage adopts the method for optical fiber-solid-phase combination, in small-signal situation, select monomode fiber to amplify, improve the extractability of small-signal, guaranteed the unimodular property of laser simultaneously, along with the raising of power output, fiber amplifier inevitably can produce some nonlinear effects, limit to a certain extent the increase of power output, now adopt solid to amplify the generation that can avoid nonlinear effect, simultaneously, solid amplifies performance, and it is easy to produce the advantage of pulsed light and process structure comparative maturity, and power output is further promoted.
Accompanying drawing explanation
Fig. 1 is the hybrid structural representation of mixing thulium pulse laser single frequency amplifier device of high-energy of the present invention.
Fig. 2 is seed laser frequency spectrum when to be that high-energy of the present invention is hybrid mix the running of the measured single longitudinal mode of thulium pulse laser single frequency amplifier device confocal Fabry-Perot interferometer.
Fig. 3 is the hybrid thulium pulse laser single frequency amplifier device seed laser output spectrum of mixing of high-energy of the present invention.
Embodiment
First refer to Fig. 1, Fig. 1 is the hybrid structural representation of mixing thulium pulse amplifier of high-energy of the present invention.As seen from the figure, the hybrid thulium pulse laser single frequency amplifier device of mixing of high-energy of the present invention, comprise: seed source 1, wavelength division multiplexer 2, pumped fiber source 3, bais single-mode list covering thulium doped fiber 4, isolator 5, beam splitter 6, output 7, filter 8, acousto-optic modulator 9, semiconductor pumping sources 10 and laser crystal 11, the continuous seed laser that described seed source 1 is exported enters described bais single-mode list covering thulium doped fiber 4 through described wavelength division multiplexer 2, the pump light that export in described pumped fiber source 3 enters described bais single-mode list covering thulium doped fiber 4 through described wavelength division multiplexer 2 described seed laser is amplified, after be divided into two parts by described beam splitter 6: a part is exported through described output 7, another part enters described laser crystal 11 after filter 8 and acousto-optic modulator 9, the pump light that described semiconductor pumping sources 10 is exported injects described laser crystal 11 and carries out solid amplification, described pumping source 3, semiconductor pumping sources 10 power are continuously adjustable.
Described seed source 1 is the solid state laser with the continuous linear cavity configuration of better single-frequency characteristic, and line width, stability are high, and have certain tunable wave length.
Described pumped fiber source 3 is erbium-ytterbium co-doped fiber lasers of single mode all optical fibre structure, its output wavelength 1550nm, and power output is up to 1.8W.
The spatial light of described seed source (1) output is entered in monomode fiber by coupled lens system, coupled.The solid state laser of linear cavity structure that adopts output wavelength 2 μ m, have the continuous wave output of good single-frequency characteristic is as seed source, utilize optical fiber splicer fine welding of pumping with wavelength division multiplexer 2 by pumped fiber source 3, this pumping source is the erbium and ytterbium codoping single-mode laser of all optical fibre structure, output wavelength 1550nm, adopt and protect partially single covering single mode thulium doped fiber, its maximum gauge is 125 μ m, and core diameter is 9 μ m, is 7.8dB/m for the absorption coefficient of 1550nm pump light.Laser crystal 11 is Tm, Ho:LuLF crystal, the laser diode multimode pumping source of wavelength 793nm centered by semiconductor pump source 10.
Claims (4)
1. the hybrid thulium pulse laser single frequency amplifier device of mixing of high-energy, be characterised in that its formation comprises: seed source (1), wavelength division multiplexer (2), pumped fiber source (3), bais single-mode list covering thulium doped fiber (4), isolator (5), beam splitter (6), output (7), filter (8), acousto-optic modulator (9), semiconductor pumping sources (10) and laser crystal (11), the continuous seed laser of described seed source (1) output enters described bais single-mode list covering thulium doped fiber (4) through described wavelength division multiplexer (2), the pump light of described pumped fiber source (3) output enters after described bais single-mode list covering thulium doped fiber (4) amplifies described seed laser and is divided into two parts by described beam splitter (6) through described wavelength division multiplexer (2): a part is through described output (7) output, another part enters described laser crystal (11) after filter (8) and acousto-optic modulator (9), the pump light of described semiconductor pumping sources (10) output injects described laser crystal (11) and carries out solid amplification, described pumping source (3), (10) power is continuously adjustable.
2. the hybrid thulium pulse amplifier of mixing of high-energy according to claim 1, it is characterized in that: described seed source (1) is the solid state laser with the continuous linear cavity configuration of better single-frequency characteristic, line width, stability are high, and have certain tunable wave length.
3. the hybrid thulium pulse amplifier of mixing of high-energy according to claim 1, is characterized in that: described pumped fiber source (3) is the erbium-ytterbium co-doped fiber laser of single mode all optical fibre structure, its output wavelength 1550nm, and power output is up to 1.8W.
4. the hybrid thulium pulse laser single frequency amplifier device of mixing of high-energy according to claim 1, is characterized in that: the spatial light of described seed source (1) output is entered in monomode fiber by coupled lens system, coupled.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337146A (en) * | 2015-11-06 | 2016-02-17 | 深圳大学 | High-peak power pulse thulium-doped laser |
| CN108336637A (en) * | 2018-03-29 | 2018-07-27 | 上海瑞柯恩激光技术有限公司 | Medical thulium doped optical fiber laser therapeutic device |
| CN108493747A (en) * | 2018-03-12 | 2018-09-04 | 中国科学院上海光学精密机械研究所 | 2 μm of high-energy pure-tone pulse lasers based on optical fiber solid Cascaded amplification |
| CN111129922A (en) * | 2019-12-09 | 2020-05-08 | 中国科学院上海光学精密机械研究所 | Large-energy hundred-ns single-frequency laser amplification system with pulse width of 1.0 mu m |
| US20210281036A1 (en) * | 2020-03-09 | 2021-09-09 | Cybel, LLC. | Broadband tm-doped optical fiber amplifier |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496320A (en) * | 2006-07-27 | 2009-07-29 | 伊雷克托科学工业股份有限公司 | Tandem photonic amplifier |
| CN103094819A (en) * | 2013-01-16 | 2013-05-08 | 中国科学院上海光学精密机械研究所 | Narrow line width acousto-optic Q-switched thulium mixed fiber laser |
-
2014
- 2014-01-28 CN CN201410040946.0A patent/CN103794981A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496320A (en) * | 2006-07-27 | 2009-07-29 | 伊雷克托科学工业股份有限公司 | Tandem photonic amplifier |
| CN103094819A (en) * | 2013-01-16 | 2013-05-08 | 中国科学院上海光学精密机械研究所 | Narrow line width acousto-optic Q-switched thulium mixed fiber laser |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337146A (en) * | 2015-11-06 | 2016-02-17 | 深圳大学 | High-peak power pulse thulium-doped laser |
| CN105337146B (en) * | 2015-11-06 | 2019-03-15 | 深圳大学 | A kind of high peak power pulse mixes thulium laser |
| CN108493747A (en) * | 2018-03-12 | 2018-09-04 | 中国科学院上海光学精密机械研究所 | 2 μm of high-energy pure-tone pulse lasers based on optical fiber solid Cascaded amplification |
| CN108336637A (en) * | 2018-03-29 | 2018-07-27 | 上海瑞柯恩激光技术有限公司 | Medical thulium doped optical fiber laser therapeutic device |
| CN111129922A (en) * | 2019-12-09 | 2020-05-08 | 中国科学院上海光学精密机械研究所 | Large-energy hundred-ns single-frequency laser amplification system with pulse width of 1.0 mu m |
| CN111129922B (en) * | 2019-12-09 | 2021-05-04 | 中国科学院上海光学精密机械研究所 | Large-energy hundred-ns single-frequency laser amplification system with pulse width of 1.0 mu m |
| US20210281036A1 (en) * | 2020-03-09 | 2021-09-09 | Cybel, LLC. | Broadband tm-doped optical fiber amplifier |
| US11509109B2 (en) * | 2020-03-09 | 2022-11-22 | Cybel, LLC. | Broadband Tm-doped optical fiber amplifier |
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Application publication date: 20140514 |