CN204315906U - Narrow-linewidth all-fiber ultrashort pulse amplification system with adjustable pulse width and repetition frequency - Google Patents
Narrow-linewidth all-fiber ultrashort pulse amplification system with adjustable pulse width and repetition frequency Download PDFInfo
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- CN204315906U CN204315906U CN201420764163.2U CN201420764163U CN204315906U CN 204315906 U CN204315906 U CN 204315906U CN 201420764163 U CN201420764163 U CN 201420764163U CN 204315906 U CN204315906 U CN 204315906U
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- 239000000835 fiber Substances 0.000 title claims abstract description 110
- 230000003321 amplification Effects 0.000 title claims abstract description 16
- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 16
- 239000013307 optical fiber Substances 0.000 claims description 61
- 238000005086 pumping Methods 0.000 claims description 29
- 238000005253 cladding Methods 0.000 claims description 22
- 239000004065 semiconductor Substances 0.000 claims description 22
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 20
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 20
- 230000003287 optical effect Effects 0.000 claims description 12
- 239000006185 dispersion Substances 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 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
- 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
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of laser, a full-fiber ultrashort pulse amplification system of narrow linewidth of pulse width adjustable repetition frequency adjustable, this amplification system is including the narrow linewidth picosecond mode locking laser oscillator that connects gradually, single mode fiber amplifier, first fiber isolator, the photoswitch that can carry out the multiple switch, a plurality of fiber circulator that connect the chirp fiber grating, fiber coupler, first double-clad fiber amplifier, second fiber isolator, can launch different repetition frequency radio frequency signal's acousto-optic modulator and second double-clad fiber amplifier, wherein the input of each fiber circulator is connected with photoswitch's different output respectively, a chirp fiber grating is connected to every fiber circulator, each chirp fiber grating's dispersion coefficient is different. The utility model discloses can export different pulsewidths and different repetition frequency's ultrashort pulse laser of high energy as required.
Description
Technical field:
The utility model belongs to laser technology field, relates to a kind of all-fiber pulse laser amplification system, particularly relates to the ultra-short pulse laser amplification system of the adjustable narrow linewidth macro-energy of a kind of adjustable pulse width repetition.
Background technology:
In coherently combined, nonlinear frequency conversion, radar etc., all need the pulse laser of high power, high light beam quality, narrow linewidth.And fiber laser has that volume is little, integrated level is high, good stability, exempt from the advantages such as debugging, the maturation of the doubly clad optical fiber drawing technology of pulse stretching technology in addition and large mould field, makes high-power ultra-short pulse laser to realize in a fiber.
Ultrashort picosecond laser more and more presents oneself advantage in Laser Micro-Machining field, be successfully applied to the manufacture of solar cell, the portraying and high-precision micropore processing and other fields of silicon circuit board.Relative nanosecond laser pulses, the laser of picopulse has less region of thermal effect, and the most high repetition frequency of nanosecond laser is limited in tens KHz, and picosecond laser just has higher repetition rate, the processing needs of Gao Zhongying can be met completely, meet the requirement of process velocity with this.But for the processing of different materials, its parameter exported for laser also has different requirements, especially pulse-width, and the requirement of repetition rate is different.If different materials selects different lasers, its processing cost is inevitable to be improved greatly.
Summary of the invention:
Problem to be solved in the utility model is to provide a kind of pulse duration can be in harmonious proportion the adjustable narrow linewidth all-fiber ultra-short pulse laser amplification system of repetition rate, and ultrashort pulse alleged here refers to picosecond pulse.
The thinking solved the problem is: the narrow linewidth psec mode-locked laser exported by seed source is after one-level monomode fiber amplifies, the chirped fiber grating of different dispersion measure is coordinated by optical switch, the switching that the distinct pulse widths realizing same laser exports, then one-level doubly clad optical fiber is adopted the pulse power of output to be promoted, carry out frequency reducing with acousto-optic modulator to Gao Zhongying laser pulse, the laser pulse realizing different repetition rates exports.Power after considering frequency reducing is lower, the optical fiber of the large mould field of one-level can be adopted again to amplify the pulse exported, the high-power narrow linewidth Ps Laser Pulse that final output pulse width is adjustable, repetition is adjustable.
The technical scheme that the utility model solves the problem is: the narrow linewidth all-fiber ultrashort pulse amplification system that the adjustable pulse width repetition provided is adjustable comprises the narrow linewidth psec mode-locked laser oscillator connected successively, single-mode optical fiber amplifier, first fibre optic isolater, the optical switch of multy-way switching can be carried out, the optical fiber circulator of multiple connection chirped fiber grating, fiber coupler, first double-cladding fiber amplifier, second fibre optic isolater, the acousto-optic modulator of different repetition rate radiofrequency signal can be launched, wherein the input of each optical fiber circulator connects from the different outputs of optical switch respectively, each optical fiber circulator connects a chirped fiber grating, the abbe number of each chirped fiber grating is different.Narrow linewidth psec mode-locked laser oscillator sends ultra-short pulse laser, amplifies through single-mode optical fiber amplifier, and then pulse duration as required selects corresponding chirped fiber grating, and it is connected to be switched by optical switch and realizes; Now, what exported by optical fiber circulator is exactly the laser with required pulsewidth, then delivers to acousto-optic modulator after the first double-cladding fiber amplifier amplifies, and carries out frequency reducing to high repetition frequency laser pulse, and the laser pulse of the repetition rate needed for realization exports.
In order to the power after improving frequency reducing further, can one-level be adopted again to amplify, that is: connect the second double-cladding fiber amplifier at the output of above-mentioned acousto-optic modulator, the pulse exported is amplified, final output pulse width is adjustable, the high-power narrow linewidth Ps Laser Pulse that repetition is adjustable.
Above-mentioned single-mode optical fiber amplifier is by single mode light pumping semiconductor laser, optical fibre wavelength division multiplexer and mix ytterbium monomode fiber and form, wherein, the signal input part of optical fibre wavelength division multiplexer is connected with the output of narrow linewidth psec mode-locked laser oscillator, the output of optical fibre wavelength division multiplexer is connected with the first fibre optic isolater by mixing ytterbium monomode fiber, and single mode light pumping semiconductor laser is connected with the pumping input of optical fibre wavelength division multiplexer.
Above-mentioned first double-cladding fiber amplifier is mixed ytterbium gain fibre by the first multimode light pumping semiconductor laser, optical-fiber bundling device and the first double clad and is formed, wherein the first multimode light pumping semiconductor laser is connected with the pumping input of optical-fiber bundling device, the signal input part of optical-fiber bundling device is connected with the output of fiber coupler, and the output of optical-fiber bundling device is mixed ytterbium gain fibre by the first double clad and is connected with the second fibre optic isolater.
Above-mentioned second double-cladding fiber amplifier is mixed ytterbium gain fibre by the second multimode light pumping semiconductor laser, pump combiner and the second double clad and is formed, wherein the second multimode light pumping semiconductor laser is connected with the pumping end of pump combiner, and the output of optical-fiber bundling device connects the second double clad and mixes ytterbium gain fibre.
The utility model adopts same laser by having the optical switch of multiple-channel output, coordinate the chirped fiber grating of different dispersion measure, achieve the demand that distinct pulse widths exports, the pulse adopting acousto-optic modulator to realize different repetition exports, final high-energy exports requirement to adopt the double-cladding fiber amplifier of two-stage ensure that, meet the laser processing needs to different materials, and can greatly reduce costs; In addition, whole system adopts all optical fibre structure, and its integrated level is high, good stability.
Accompanying drawing explanation
Fig. 1 is the light channel structure schematic diagram of ultra-short pulse laser amplification system provided by the utility model.
Number in figure: 1-narrow linewidth mode-locked fiber lasers oscillator; 2-single mode light pumping semiconductor laser; 3-optical fibre wavelength division multiplexer; 4-mixes ytterbium single mode gain fibre; 5-first fibre optic isolater; 6-multy-way switching optical switch; 7a, 7b, 7c, 7d-first, second, third, fourth optical fiber circulator; 8a, 8b, 8c, 8d-first, second, third, fourth chirped fiber grating; 9-fiber coupler; 10-first multimode light pumping semiconductor laser; 11-optical-fiber bundling device 1,12-first ytterbium-doped double-cladded-layer gain fibre; 13-second fibre optic isolater; 14-acousto-optic modulator; 15-second multimode light pumping semiconductor laser; 16-pump combiner; 17-second ytterbium-doped double-cladded-layer gain fibre.
Embodiment
Below in conjunction with accompanying drawing, content of the present utility model is described in detail.
Fig. 1 gives an example of the present utility model.The laser repetition rate that narrow linewidth mode-locked fiber lasers oscillator 1 exports is 30MHz, and breadth of spectrum line is less than 0.1nm, pulsewidth 25ps, power 20mW; Single-mode optical fiber amplifier is amplified by single mode light pumping semiconductor laser 2, optical fibre wavelength division multiplexer 3 and is mixed ytterbium monomode fiber 4 (core diameter 6 μm, cladding diameter 125 μm) composition, amplify through single-mode optical fiber amplifier, due to the Spectral Broadening of optical fiber after amplification, single mode amplified signal spectral width becomes 0.3nm, and its output is connected with multy-way switching optical switch 6 by the first fibre optic isolater 5.Multy-way switching optical switch 6 is 1*4 type optical switch, and comprise an input and four outputs, input connects with single-mode optical fiber amplifier output, and four tunnels that can realize light path switch.The first via is made up of the first optical fiber circulator 7a and the first chirped fiber grating 8a, secondary route second optical fiber circulator 7b and the second chirped fiber grating 8b forms, 3rd route the 3rd optical fiber circulator 7c and the 3rd chirped fiber grating 8c forms, and the 4th route the 4th optical fiber circulator 7d and the 4th chirped fiber grating 8d forms; Each optical fiber circulator comprises light input end, light output end and connects the link of chirped fiber grating, and the input of the output connecting fiber circulator of optical switch, optical fiber circulator is by output incoming fiber optic coupler 9.Above-mentioned four chirped fiber gratings have fixed-bandwidth and positive dispersion characteristic, but their abbe number is different, is respectively 50ps/nm, 100ps/nm, 400ps/nm, 800ps/nm, and the mode that can be directly welded by optical fiber is connected to amplifies in light path.The chirped fiber grating of four different abbe numbers can realize four kinds of distinct pulse widths and export, and pulse duration range can cover tens psecs to hundreds of psec, and the laser pulse width that this example exports is about 40ps, 55ps, 145ps, 265ps respectively.Fiber coupler 9 has four inputs and an output, the input of the output connecting fiber coupler of optical fiber circulator, the output of fiber coupler 9 is connected with the optical-fiber bundling device 11 of the first double-cladding fiber amplifier, the laser that fiber coupler 9 exports amplifies through the first double-cladding fiber amplifier, promotes pulse energy.First double-cladding fiber amplifier is made up of multimode light pumping semiconductor laser 10, optical-fiber bundling device 11 and the first ytterbium-doped double-cladded-layer gain fibre 12 (fibre core diameter is 10 μm, and cladding diameter is 125 μm); The output of the first double-cladding fiber amplifier is connected with acousto-optic modulator 14 input by high-power fiber optic isolator 13.The laser pulse of the Gao Zhongying of input, by launching the radiofrequency signal of different heavy complex frequency, is carried out frequency reducing, the repetition rate of pulse can be dropped to 100KHz, 574KHz, 1MHz, 10MHz by acousto-optic modulator 14.If just significantly can be improved the energy of pulse again by first stage amplifier.Second double-cladding fiber amplifier of this example is by the second multimode light pumping semiconductor laser 15, pump combiner 16 and the second double clad mix ytterbium gain fibre 17, and (fibre core diameter is 30 μm, 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 promotes pulse energy.The utility model as required, also can be designed to the output of 5-8 kind distinct pulse widths.
Claims (6)
1. the narrow linewidth all-fiber ultrashort pulse amplification system that an adjustable pulse width repetition is adjustable, it is characterized in that comprising the narrow linewidth psec mode-locked laser oscillator connected successively, single-mode optical fiber amplifier, first fibre optic isolater, the optical switch of multy-way switching can be carried out, the optical fiber circulator of multiple connection chirped fiber grating, fiber coupler, first double-cladding fiber amplifier, second fibre optic isolater, the acousto-optic modulator of different repetition rate radiofrequency signal can be launched, wherein the input of each optical fiber circulator connects from the different outputs of optical switch respectively, each optical fiber circulator connects a chirped fiber grating, the abbe number of each chirped fiber grating is different.
2. ultrashort pulse amplification system according to claim 1, is characterized in that the output of acousto-optic modulator connects the second double-cladding fiber amplifier.
3. ultrashort pulse amplification system according to claim 1 and 2, it is characterized in that single-mode optical fiber amplifier is by single mode light pumping semiconductor laser, optical fibre wavelength division multiplexer with mix ytterbium monomode fiber and form, wherein, the signal input part of optical fibre wavelength division multiplexer is connected with the output of narrow linewidth psec mode-locked laser oscillator, the output of optical fibre wavelength division multiplexer is connected with the first fibre optic isolater by mixing ytterbium monomode fiber, and single mode light pumping semiconductor laser is connected with the pumping input of optical fibre wavelength division multiplexer.
4. ultrashort pulse amplification system according to claim 3, it is characterized in that the first double-cladding fiber amplifier is mixed ytterbium gain fibre by the first multimode light pumping semiconductor laser, optical-fiber bundling device and the first double clad and formed, wherein the first multimode light pumping semiconductor laser is connected with optical-fiber bundling device, the input of optical-fiber bundling device is connected with the output of fiber coupler, and the output of optical-fiber bundling device is mixed ytterbium gain fibre by the first double clad and is connected with the second fibre optic isolater.
5. ultrashort pulse amplification system according to claim 2, it is characterized in that single-mode optical fiber amplifier is by single mode light pumping semiconductor laser, optical fibre wavelength division multiplexer with mix ytterbium monomode fiber and form, wherein, the signal input part of optical fibre wavelength division multiplexer is connected with the output of narrow linewidth psec mode-locked laser oscillator, the output of optical fibre wavelength division multiplexer is connected with the first fibre optic isolater by mixing ytterbium monomode fiber, and single mode light pumping semiconductor laser is connected with the pumping input of optical fibre wavelength division multiplexer; First double-cladding fiber amplifier is mixed ytterbium gain fibre by the first multimode light pumping semiconductor laser, optical-fiber bundling device and the first double clad and is formed, wherein the first multimode light pumping semiconductor laser is connected with the pumping input of optical-fiber bundling device, the signal input part of optical-fiber bundling device is connected with the output of fiber coupler, and the output of optical-fiber bundling device 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 mixed ytterbium gain fibre by the second multimode light pumping semiconductor laser, pump combiner and the second double clad and is formed, wherein the second multimode light pumping semiconductor laser is connected with the pumping input of pump combiner, and the output of optical-fiber bundling device connects the second double clad and mixes ytterbium gain fibre.
6. ultrashort pulse amplification system according to claim 5, it is characterized in that the core diameter of the first ytterbium-doped double-cladded-layer gain fibre is 10 μm, cladding diameter is 125 μm, and the core diameter that the second double clad mixes ytterbium gain fibre is 30 μm, and cladding diameter is 250 μm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420764163.2U CN204315906U (en) | 2014-12-05 | 2014-12-05 | Narrow-linewidth all-fiber ultrashort pulse amplification system with adjustable pulse width and repetition frequency |
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| CN201420764163.2U CN204315906U (en) | 2014-12-05 | 2014-12-05 | Narrow-linewidth all-fiber ultrashort pulse amplification system with adjustable pulse width and repetition frequency |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505699A (en) * | 2014-12-05 | 2015-04-08 | 中国科学院西安光学精密机械研究所 | Narrow-linewidth all-fiber ultrashort pulse amplification system with adjustable pulse width and repetition frequency |
| CN106209249A (en) * | 2016-07-26 | 2016-12-07 | 浙江大学 | The double chirp radar pulse generator of wideband adjustable based on microwave photon technology |
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2014
- 2014-12-05 CN CN201420764163.2U patent/CN204315906U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505699A (en) * | 2014-12-05 | 2015-04-08 | 中国科学院西安光学精密机械研究所 | Narrow-linewidth all-fiber ultrashort pulse amplification system with adjustable pulse width and repetition frequency |
| CN104505699B (en) * | 2014-12-05 | 2017-07-28 | 中国科学院西安光学精密机械研究所 | Narrow-linewidth all-fiber ultrashort pulse amplification system with adjustable pulse width and repetition frequency |
| CN106209249A (en) * | 2016-07-26 | 2016-12-07 | 浙江大学 | The double chirp radar pulse generator of wideband adjustable based on microwave photon technology |
| CN106209249B (en) * | 2016-07-26 | 2018-06-01 | 浙江大学 | The double chirp radar impulse generators of wideband adjustable based on microwave photon technology |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150506 Termination date: 20181205 |