CN104505699B - The adjustable narrow linewidth all -fiber ultrashort pulse amplification system of adjustable pulse width repetition - Google Patents
The adjustable narrow linewidth all -fiber ultrashort pulse amplification system of adjustable pulse width repetition Download PDFInfo
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- CN104505699B CN104505699B CN201410741702.5A CN201410741702A CN104505699B CN 104505699 B CN104505699 B CN 104505699B CN 201410741702 A CN201410741702 A CN 201410741702A CN 104505699 B CN104505699 B CN 104505699B
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- 239000000835 fiber Substances 0.000 title claims abstract description 104
- 230000003321 amplification Effects 0.000 title claims abstract description 21
- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 21
- 239000013307 optical fiber Substances 0.000 claims abstract description 64
- 238000005253 cladding Methods 0.000 claims abstract description 25
- 238000005086 pumping Methods 0.000 claims description 28
- 239000004065 semiconductor Substances 0.000 claims description 21
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 20
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 11
- 238000001228 spectrum Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 4
- 210000001367 artery Anatomy 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012681 fiber drawing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005459 micromachining Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Abstract
The adjustable narrow linewidth all -fiber ultrashort pulse amplification system of adjustable pulse width repetition.The invention belongs to laser technology field, it is that a kind of pulse width can reconcile the adjustable narrow linewidth all -fiber ultra-short pulse laser amplification system of repetition rate, the amplification system includes the narrow linewidth psec mode-locked laser oscillator being sequentially connected, single-mode optical fiber amplifier, first fibre optic isolater, the photoswitch of multy-way switching can be carried out, the optical fiber circulator of multiple connection chirped fiber gratings, fiber coupler, first double-cladding fiber amplifier, second fibre optic isolater, the acousto-optic modulator and the second double-cladding fiber amplifier of different repetition rate radiofrequency signals can be launched, the wherein input of each optical fiber circulator output end connections different from photoswitch respectively, each optical fiber circulator connects a chirped fiber grating, the abbe number of each chirped fiber grating is different.The present invention can export the high-energy ultra-short pulse laser of distinct pulse widths and different repetition rates as needed.
Description
Technical field：
The invention belongs to laser technology field, it is related to a kind of all -fiber pulse laser amplification system, more particularly to a kind of arteries and veins
The ultra-short pulse laser amplification system of the big energy of the wide adjustable adjustable narrow linewidth of repetition.
Background technology：
In terms of coherently combined, nonlinear frequency conversion, the radar, high power, high light beam quality, narrow linewidth are required for
Pulse laser.And optical fiber laser has the advantages that small volume, integrated level are high, stability is good, exempts from debugging, pulse stretching skill in addition
The maturation of the doubly clad optical fiber drawing technology of art and large mode field so that high-power ultra-short pulse laser can be real in a fiber
It is existing.
Ultrashort picosecond laser has increasingly showed the advantage of oneself in Laser Micro-Machining field, is applied successfully to
The manufacture of solar cell, silicon circuit board are portrayed and high-precision micropore processing and other fields.With respect to nanosecond laser pulses, psec arteries and veins
The laser of punching has smaller region of thermal effect, and nanosecond laser highest repetition rate is limited in tens KHz, and picosecond laser is just
With higher repetition rate, the processing needs of Gao Zhongying can be met completely, the requirement of process velocity is met with this.But for
The processing of different materials, it also has different requirements, especially pulse-width, repetition rate for the parameter that laser is exported
Requirement it is different.If different materials select different lasers, its processing cost is inevitable greatly to be improved.
The content of the invention：
Problem to be solved by this invention, which is to provide a kind of pulse width, can reconcile the full light of the adjustable narrow linewidth of repetition rate
Fine ultra-short pulse laser amplification system, ultrashort pulse designated herein refers to picosecond pulse.
The thinking solved the above problems is：The narrow linewidth psec mode-locked laser that seed source is exported passes through one-level single-mode fiber
After amplification, the chirped fiber grating of different dispersion measures is coordinated by photoswitch, realizes that the distinct pulse widths of same laser are defeated
The switching gone out, is then lifted the pulse power of output using one-level doubly clad optical fiber, with acousto-optic modulator to Gao Zhongying
Laser pulse carries out frequency reducing, realizes the pulsed laser output of different repetition rates.It is relatively low in view of the power after frequency reducing, can
It is amplified with the pulse again using the optical fiber of one-level large mode field to output, final output adjustable pulse width, the adjustable Gao Gong of repetition
The narrow linewidth Ps Laser Pulse of rate.
Technical proposal that the invention solves the above-mentioned problems is：The adjustable narrow linewidth all -fiber of adjustable pulse width repetition provided
Ultrashort pulse amplification system includes narrow linewidth psec mode-locked laser oscillator, single-mode optical fiber amplifier, the first light being sequentially connected
Fiber isolator, the photoswitch that multy-way switching can be carried out, the optical fiber circulator of multiple connection chirped fiber gratings, fiber coupler,
First double-cladding fiber amplifier, the second fibre optic isolater, the acousto-optic modulator that different repetition rate radiofrequency signals can be launched, its
In each optical fiber circulator input different from photoswitch output ends connection respectively, each optical fiber circulator connects a Zhou
Sing fiber grating, the abbe number of each chirped fiber grating is different.Narrow linewidth psec mode-locked laser oscillator sends ultrashort arteries and veins
Impulse light, amplifies through single-mode optical fiber amplifier, and then pulse width as needed selects corresponding chirped fiber grating, and it connects
Connect by photoswitch switching to realize；Now, it is exactly the laser of the pulsewidth with needed for by what optical fiber circulator was exported, then passes through
Acousto-optic modulator is delivered to after the amplification of first double-cladding fiber amplifier, frequency reducing is carried out to high repetition frequency laser pulse, institute is realized
The pulsed laser output of the repetition rate needed.
In order to further improve the power after frequency reducing, it can be amplified again using one-level, i.e.,：In above-mentioned acousto-optic modulator
Output end connects the second double-cladding fiber amplifier, and the pulse to output is amplified, final output adjustable pulse width, and repetition is adjustable
High-power narrow linewidth Ps Laser Pulse.
Above-mentioned single-mode optical fiber amplifier is by single mode light pumping semiconductor laser, optical fibre wavelength division multiplexer and mixes ytterbium single-mode fiber
Composition, wherein, the signal input part of optical fibre wavelength division multiplexer is connected with the output end of narrow linewidth psec mode-locked laser oscillator, light
The output end of fine wavelength division multiplexer is connected by mixing ytterbium single-mode fiber with the first fibre optic isolater, single mode light pumping semiconductor laser
It is connected with the pumping input of optical fibre wavelength division multiplexer.
Above-mentioned first double-cladding fiber amplifier is by the first multimode light pumping semiconductor laser, optical-fiber bundling device and first pair
Doped cladding layer ytterbium gain fibre is constituted, wherein the pumping input of the first multimode light pumping semiconductor laser and optical-fiber bundling device connects
Connect, the signal input part of optical-fiber bundling device and the output end of fiber coupler are connected, and the output end of optical-fiber bundling device passes through first
Double clad is mixed ytterbium gain fibre and is connected with the second fibre optic isolater.
Above-mentioned second double-cladding fiber amplifier is by the second multimode light pumping semiconductor laser, pump combiner and second pair
Doped cladding layer ytterbium gain fibre is constituted, wherein the pumping end connection of the second multimode light pumping semiconductor laser and pump combiner, light
The output end of fine bundling device connects the second double clad and mixes ytterbium gain fibre.
The present invention, by the photoswitch with multiple-channel output, coordinates the chirped light of different dispersion measures using same laser
Fine grating, realizes the demand of distinct pulse widths output, and the pulse for realizing different repetitions using acousto-optic modulator is exported, using two-stage
Double-cladding fiber amplifier ensure that final high-energy output is required, meet the Laser Processing needs to different materials,
And cost can be substantially reduced；In addition, whole system uses all optical fibre structure, its integrated level is high, and stability is good.
Brief description of the drawings
Fig. 1 is the light channel structure schematic diagram of ultra-short pulse laser amplification system provided by the present invention.
Numbered in figure：1- narrow linewidth mode-locked fiber lasers oscillators；2- single mode light pumping semiconductor lasers；3- optical fiber wavelength divisions
Multiplexer；4- mixes ytterbium single mode gain fibre；The fibre optic isolaters of 5- first；6- multy-way switching photoswitches；7a, 7b, 7c, 7d- first,
Second, third, the 4th optical fiber circulator；The chirped fiber grating of 8a, 8b, 8c, 8d- first, second, third, fourth；9- optical fiber couplings
Clutch；10- the first multimode light pumping semiconductor lasers；11- optical-fiber bundling devices 1,12- the first ytterbium-doped double-cladded-layer gain fibres；13-
Second fibre optic isolater；14- acousto-optic modulators；15- the second multimode light pumping semiconductor lasers；16- pump combiners；17-
Two ytterbium-doped double-cladded-layer gain fibres.
Embodiment
Present disclosure is described in detail below in conjunction with accompanying drawing.
Fig. 1 gives an example of the present invention.The laser repetition rate that narrow linewidth mode-locked fiber lasers oscillator 1 is exported
For 30MHz, breadth of spectrum line is less than 0.1nm, pulsewidth 25ps, power 20mW；Single-mode optical fiber amplifier amplification is partly led by single mode pumping
Body laser 2, optical fibre wavelength division multiplexer 3 and mix ytterbium single-mode fiber 4 (6 μm of core diameter, 125 μm of cladding diameter) composition, through list
Mode fiber amplifier amplifies, and due to the Spectral Broadening of optical fiber after amplification, single mode amplified signal spectral width is changed into
0.3nm, its output end is connected by the first fibre optic isolater 5 with multy-way switching photoswitch 6.Multy-way switching photoswitch 6 is 1*4 types
Photoswitch, including an input and four output ends, input connect with single-mode optical fiber amplifier output end, it is possible to achieve light
The four tunnels switching on road.The first via is made up of the first optical fiber circulator 7a and the first chirped fiber grating 8a, the light of secondary route second
Fine circulator 7b and the second chirped fiber grating 8b compositions, the 3rd the 3rd optical fiber circulator 7c of route and the 3rd chirped fiber grating
8c is constituted, the 4th the 4th optical fiber circulator 7d of route and the 4th chirped fiber grating 8d compositions；It is defeated that each optical fiber circulator includes light
Enter end, light output end and the connection end for connecting chirped fiber grating, the output end of photoswitch connects the input of optical fiber circulator
End, optical fiber circulator passes through output end incoming fiber optic coupler 9.Aforementioned four chirped fiber grating has fixed-bandwidth and countenance
Characteristic, but their abbe number difference, respectively 50ps/nm, 100ps/nm, 400ps/nm, 800ps/nm are dissipated, can be direct
It is connected to by way of optical fiber is welded in amplification light path.The chirped fiber grating of four different abbe numbers can realize four kinds not
With pulsewidth output, pulse duration range can cover tens psecs to hundreds of psecs, the laser pulse width of this example output respectively may be about 40ps,
55ps、145ps、265ps.Fiber coupler 9 has four inputs and an output end, and the output end of optical fiber circulator is connected
The input of fiber coupler, the output end of fiber coupler 9 and the optical-fiber bundling device 11 of the first double-cladding fiber amplifier connect
Connect, the laser that fiber coupler 9 is exported amplifies through the first double-cladding fiber amplifier, lift pulse energy.First double clad light
Fiber amplifier is by multimode the light pumping semiconductor laser 10, (optical fiber of 11 and first ytterbium-doped double-cladded-layer gain fibre of optical-fiber bundling device 12
Core diameter is 10 μm, and cladding diameter is 125 μm) composition；The output end of first double-cladding fiber amplifier passes through high power light
Fiber isolator 13 is connected with the input of acousto-optic modulator 14.Acousto-optic modulator 14 is believed by launching the radio frequency of different heavy complex frequencies
Number, the laser pulse of the Gao Zhongying of input is subjected to frequency reducing, the repetition rate of pulse can be dropped to 100KHz, 574KHz,
1MHz、10MHz.If again by first stage amplifier if the energy of pulse can be greatly improved.Second pair of this example
Cladded-fiber amplifier mixes ytterbium gain light by the second multimode light pumping semiconductor laser 15, the double clad of pump combiner 16 and second
Fibre 17 (fibre core diameter is 30 μm, and cladding diameter is 250 μm) composition, pump combiner 16 is connected with acousto-optic modulator 14；
Second double-cladding fiber amplifier amplifies the pulse after final frequency reducing, further lifts pulse energy.It is of the invention as needed,
The output of 5-8 kind distinct pulse widths can also be designed to.
Claims (5)
1. a kind of adjustable narrow linewidth all -fiber ultrashort pulse amplification system of adjustable pulse width repetition, it is characterized in that including being sequentially connected
Narrow linewidth psec mode-locked laser oscillator, single-mode optical fiber amplifier, the first fibre optic isolater, the light that can carry out multy-way switching opens
Pass, optical fiber circulator, fiber coupler, the first double-cladding fiber amplifier, the second optical fiber of multiple connection chirped fiber gratings
The input difference of isolator, the acousto-optic modulator that different repetition rate radiofrequency signals can be launched, wherein each optical fiber circulator
Output end connections different from photoswitch, each optical fiber circulator connects a chirped fiber grating, each chirped fiber grating
Abbe number it is different, the breadth of spectrum line of the narrow linewidth psec mode-locked laser oscillator output is less than 0.1nm, and single-mode fiber is put
Signal spectrum width after big device amplification is 0.3nm.
2. the adjustable narrow linewidth all -fiber ultrashort pulse amplification system of adjustable pulse width repetition according to claim 1, it is special
Levy be acousto-optic modulator output end connect the second double-cladding fiber amplifier.
3. the adjustable narrow linewidth all -fiber ultrashort pulse amplification system of adjustable pulse width repetition according to claim 1 or 2, its
It is characterized in single-mode optical fiber amplifier by single mode light pumping semiconductor laser, optical fibre wavelength division multiplexer and mixes ytterbium single-mode fiber and constitute,
Wherein, the signal input part of optical fibre wavelength division multiplexer is connected with the output end of narrow linewidth psec mode-locked laser oscillator, optical fiber ripple
The output end of division multiplexer is connected by mixing ytterbium single-mode fiber with the first fibre optic isolater, single mode light pumping semiconductor laser and light
The pumping input connection of fine wavelength division multiplexer.
4. the adjustable narrow linewidth all -fiber ultrashort pulse amplification system of adjustable pulse width repetition according to claim 3, it is special
Levy is that the first double-cladding fiber amplifier mixes ytterbium by the first multimode light pumping semiconductor laser, optical-fiber bundling device and the first double clad
Gain fibre is constituted, wherein the first multimode light pumping semiconductor laser is connected with optical-fiber bundling device, the input of optical-fiber bundling device
It is connected with the output end of fiber coupler, the output end of optical-fiber bundling device mixes ytterbium gain fibre and the second light by the first double clad
Fiber isolator is connected.
5. the adjustable narrow linewidth all -fiber ultrashort pulse amplification system of adjustable pulse width repetition according to claim 2, it is special
Levying is single-mode optical fiber amplifier by single mode light pumping semiconductor laser, optical fibre wavelength division multiplexer and mixes ytterbium single-mode fiber and constitute, its
In, the signal input part of optical fibre wavelength division multiplexer is connected with the output end of narrow linewidth psec mode-locked laser oscillator, optical fiber wavelength division
The output end of multiplexer is connected by mixing ytterbium single-mode fiber with the first fibre optic isolater, single mode light pumping semiconductor laser and optical fiber
The pumping input connection of wavelength division multiplexer；First double-cladding fiber amplifier is by the first multimode light pumping semiconductor laser, light
Fine bundling device and the first double clad mix ytterbium gain fibre composition, wherein the first multimode light pumping semiconductor laser and optical-fiber bundling device
The connection of pumping input, the output end of the signal input part of optical-fiber bundling device and fiber coupler connects, optical-fiber bundling device
Output end is mixed ytterbium gain fibre by the first double clad and is connected with the second fibre optic isolater；Second double-cladding fiber amplifier is by
Two multimode light pumping semiconductor lasers, pump combiner and the second double clad mix ytterbium gain fibre composition, wherein the second multimode is taken out
The pumping input for transporting semiconductor laser and pump combiner is connected, and the output end of optical-fiber bundling device connects the second double clad and mixed
Ytterbium gain fibre, wherein the core diameter of the first ytterbium-doped double-cladded-layer gain fibre is 10 μm, cladding diameter is 125 μm, second pair
The core diameter of doped cladding layer ytterbium gain fibre is 30 μm, and cladding diameter is 250 μm.
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| CN105896255A (en) * | 2016-06-21 | 2016-08-24 | 上海理工大学 | Adjustable picosecond solid laser system |
| CN106058621A (en) * | 2016-06-21 | 2016-10-26 | 上海理工大学 | Adjustable picosecond laser |
| CN105896262A (en) * | 2016-06-21 | 2016-08-24 | 上海理工大学 | Adjustable picosecond optical fibre laser system |
| CN106785875A (en) * | 2017-01-22 | 2017-05-31 | 昆山华辰光电科技有限公司 | The MOPA optical fiber lasers of adjustable pulse width |
| CN108565671A (en) * | 2018-03-26 | 2018-09-21 | 中国工程物理研究院激光聚变研究中心 | A kind of mode locked fiber laser |
| CN110086078A (en) * | 2019-04-19 | 2019-08-02 | 北京盛镭科技有限公司 | Picosecond optical fiber seed laser |
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| CN111952830A (en) * | 2020-07-21 | 2020-11-17 | 大族激光科技产业集团股份有限公司 | Nanosecond seed source and double-pulse-width optical fiber laser |
| CN112202041B (en) * | 2020-10-12 | 2022-04-26 | 中国人民解放军军事科学院国防科技创新研究院 | Pulse fiber laser and working method |
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| CN115498491B (en) * | 2022-10-28 | 2023-04-28 | 北京工业大学 | Multi-range pulse width adjustable ultrashort pulse laser |
| CN117239529B (en) * | 2023-11-16 | 2024-01-23 | 长春理工大学 | High-repetition-frequency anhydrous air-cooling-free laser based on acoustic-optical path regulation and control and output method |
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Effective date of registration: 20190422 Address after: 710119 Room 323, Zutong Building, No. 17 Information Avenue, New Industrial Park, Xi'an High-tech Zone, Shaanxi Province Patentee after: XI'AN INSTITUTE OF OPTICS AND PRECISION MECHANICS OF CAS Address before: 710119, No. 17, information Avenue, new industrial park, hi tech Zone, Shaanxi, Xi'an Patentee before: Xi-an Inst. of Optics and Fine Mechanics, Chinese Academy of Sciences |
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Effective date of registration: 20211020 Address after: 710000 room 109, 1f, building a, pilot Institute, No. 15, Shanglinyuan 1st Road, high tech Zone, Xi'an, Shaanxi Province Patentee after: Xi'an aochuang Photon Technology Co.,Ltd. Address before: 311200 Hongxing Road 117, Xiaoshan economic and Technological Development Zone, Xiaoshan District, Hangzhou, Zhejiang Patentee before: Hangzhou Aochuang Photonics Technology Co.,Ltd. |
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Effective date of registration: 20211224 Address after: 311200 Hongxing Road 117, Xiaoshan economic and Technological Development Zone, Xiaoshan District, Hangzhou, Zhejiang Patentee after: Hangzhou Aochuang Photonics Technology Co.,Ltd. Address before: 710000 room 109, 1f, building a, pilot Institute, No. 15, Shanglinyuan 1st Road, high tech Zone, Xi'an, Shaanxi Province Patentee before: Xi'an aochuang Photon Technology Co.,Ltd. |
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