CN100561808C - Optical Parametric Amplification System Based on All-Fiber Laser - Google Patents
Optical Parametric Amplification System Based on All-Fiber Laser Download PDFInfo
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- CN100561808C CN100561808C CNB2006101046864A CN200610104686A CN100561808C CN 100561808 C CN100561808 C CN 100561808C CN B2006101046864 A CNB2006101046864 A CN B2006101046864A CN 200610104686 A CN200610104686 A CN 200610104686A CN 100561808 C CN100561808 C CN 100561808C
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Abstract
本发明涉及一种基于全光纤激光器的光参量放大系统。本发明的技术解决方案是：本发明包括泵浦源、信号源、同步发生器、放大器和压缩器，信号源触发同步发生器，同步发生器控制泵浦源，信号源与泵浦源同时接入放大器，放大器接入压缩器。本发明为解决背景技术中的啁啾脉冲光参量放大器存在的整个系统难以维护、稳定性不高、结构不紧凑且易产生光学损伤的技术问题，而提供一种结构紧凑、性能稳定、光束质量好、信噪比高、单程增益高的基于全光纤激光器的光参量放大系统。
The invention relates to an optical parameter amplification system based on an all-fiber laser. The technical solution of the present invention is: the present invention comprises pumping source, signal source, synchronous generator, amplifier and compressor, signal source triggers synchronous generator, synchronous generator controls pumping source, signal source and pumping source connect simultaneously into the amplifier, and the amplifier into the compressor. In order to solve the technical problems of the chirped pulse optical parametric amplifier in the background technology that the whole system is difficult to maintain, the stability is not high, the structure is not compact and optical damage is easy to occur, the present invention provides a compact structure, stable performance, high beam quality Optical parametric amplification system based on all-fiber laser with good signal-to-noise ratio and high single-pass gain.
Description
Technical field
The present invention relates to a kind of optical parameter amplification system based on full-optical-fiber laser.
Background technology
Energy is superpower, the extremely development of short femtosecond laser of pulse duration, and the research that directly drives physics, chemistry, biology, material and information science enters microcosmic ultrafast process field.Especially utilize chirped pulse optical parameter amplifying technique to produce that superpower, ultrashort femtosecond laser has in fields such as high field physics, X ray, Ah second's science and Image Information Processing technology and important use is worth.Research and development compact conformation, little, the stable high chirped pulse photoparametric amplifier of volume seem particularly important.
Traditional chirped pulse photoparametric amplifier, generally be made of devices such as femtosecond oscillator, stretcher, amplifier and compressor reducers, the amplifier of this kind structure can cause that whole system is difficult to safeguard, stability is not high, structure is not compact and easily produce shortcoming such as optical damage.
Summary of the invention
The present invention is for the whole system that the chirped pulse photoparametric amplifier that solves in the background technology exists is difficult to safeguard, stability is not high, structure is not compact and easily produce the technical problem of optical damage, and a kind of compact conformation, stable performance, good beam quality, signal to noise ratio height, the optical parameter amplification system based on full-optical-fiber laser that gain by one path is high are provided.
Technical solution of the present invention is: the present invention is a kind of optical parameter amplification system based on full-optical-fiber laser, its special character is: this amplification system comprises pumping source 29, signal source 22, synchronizing generator 33, amplifier 34 and compressor reducer 30, signal source 22 triggering synchronous generators 33, synchronizing generator 33 control pumping sources 29, signal source 22 inserts amplifier 34 simultaneously with pumping source 29, and amplifier 34 inserts compressor reducer 30.
Above-mentioned pumping source 29 adopts Seeded PR II 8010 type macro-energy single longitudinal modes to transfer Q Nd:YAG laser or ps level pumping source.
Above-mentioned signal source 22 adopts fiber laser.
Above-mentioned synchronizing generator 33 comprises first prism 25, second prism 26, Pockers cell 27,5046E Pockers cell driving power 23, DG535 digit pulse time-delay/generator 24, described first prism 25, second prism 26 is separately positioned on Pockers cell 27 both sides, described 5046E Pockers cell driving power 23, DG535 digit pulse time-delay/generator 24 joins with Pockers cell 27 respectively, described 5046E Pockers cell driving power 23 joins with DG535 digit pulse time-delay/generator 24, described second prism 26 inserts 5046E Pockers cell driving power 23, and described DG535 digit pulse time-delay/generator 24 inserts pumping source 29.
Above-mentioned amplifier 34 comprises beam splitter 1, first half-wave plate 2, first polarizer 3, first biconvex lens 4, first vacuum tube 5, second biconvex lens 6, first dichroic mirror 7, crystal 8 is amplified in the second level, first absorption cell 9, high threshold film speculum 10, second half-wave plate 11, second polarizer 12, the 3rd biconvex lens 13, second vacuum tube 14, the 4th biconvex lens 15, second dichroic mirror 16, the first order is amplified crystal 17, second absorption cell 18, the 5th biconvex lens 19, the 6th biconvex lens 20, first changes polariscope 21, speculum 28, the 3rd dichroic mirror 31 and second changes polariscope 32; Be disposed with speculum 28, first on the light path of described synchronizing generator 33 outgoing and change polariscope 21, the 6th biconvex lens 20, second dichroic mirror 16, first order amplification crystal 17, the 3rd dichroic mirror 31, the 5th biconvex lens 19, first dichroic mirror 7, the second amplification crystal 8, second commentaries on classics polariscope 32 and the compressor reducer 30; Described pumping source 29 is by beam splitter 1 outgoing two-way light, be disposed with first half-wave plate 2, first polarizer 3, first biconvex lens 4, first vacuum tube 5, second biconvex lens 6, second level amplification crystal 8 and first absorption cell 9 on one tunnel light path, be disposed with high threshold film speculum 10, second half-wave plate 11, second polarizer 12, the 3rd biconvex lens 13, second vacuum tube 14, the 4th biconvex lens 15, first order amplification crystal 17 and second absorption cell 18 on another road light path.
Above-mentioned the 6th biconvex lens 20 is 1,2 or 3.
Above-mentioned the 5th biconvex lens 19 is 1,2 or 3.
Crystal 8 is amplified in the above-mentioned second level, first order amplification crystal 17 is a bbo crystal.
The present invention is a branch of flashlight with fiber laser output, after Pockers cell is chosen pulse, directly enter in the nonlinear crystal and carry out the optical parameter coupling with a branch of arrowband pump light synchronous, the high-energy nanosecond, produce the promptly idle light of three-beam simultaneously, in the coupling process energy from the pump light pulses switch to signal pulse, thereby signal pulse is exaggerated, and the signal pulse after the amplification arrives nearly Fourier transform limit with double grating compressor compresses simple in structure.Therefore the present invention has adopted fiber laser, amplifier and compressor reducer, and the 8 font chamber ytterbium-doping optical fiber lasers that utilize nonlinear optical fiber annular mirror locked mode have self-starting, long-time stable mode-locking, seldom are subjected to the characteristics of the influence that external environment changes, adopt integrated passive mode locking ytterbium-doping optical fiber laser as seed source, when having avoided optical damage, improved the stability of whole system greatly, make the whole system compact conformation, be convenient to safeguard.
Description of drawings
Fig. 1 is a theory diagram of the present invention;
Fig. 2 is the structural representation of the embodiment of the invention;
Fig. 3 is the pulse curve figure of the incoming signal light of the embodiment of the invention;
Fig. 4 is the one-level amplifying signal gain of light figure of the embodiment of the invention;
Fig. 5 is the secondary amplifying signal gain of light figure of the embodiment of the invention;
Fig. 6 is the incoming signal light and the amplifying signal light spectrogram of the embodiment of the invention;
Fig. 7 is the ideler frequency light spectrogram of the embodiment of the invention.
Description of reference numerals is as follows:
The 1-beam splitter, 2-first half-wave plate, 3-first polarizer, 4-first biconvex lens, 5-first vacuum tube, 6-second biconvex lens, 7-first dichroic mirror, crystal is amplified in the 8-second level, 9-first absorption cell, 10-high threshold film speculum, 11-second half-wave plate, 12-second polarizer, 13-the 3rd biconvex lens, 14-second vacuum tube, 15-the 4th biconvex lens, 16-second dichroic mirror, the 17-first order is amplified crystal, 18-second absorption cell, 19-the 5th biconvex lens, 20-the 6th biconvex lens, 21-first changes polariscope, the 22-signal source, 23-5046E Pockers cell driving power, 24-DG535 digit pulse time-delay/generator, 25-first prism, 26-second prism, the 27-Pockers cell, the 28-speculum, the 29-pumping source, the 30-compressor reducer, 31-the 3rd dichroic mirror, 32-second changes polariscope, the 33-synchronizing generator, the 34-amplifier.
Embodiment
Referring to Fig. 1, the present invention includes pumping source 29, signal source 22, synchronizing generator 33, amplifier 34 and compressor reducer 30, signal source 22 triggering synchronous generators 33, synchronizing generator 33 control pumping sources 29, signal source 22 inserts amplifier 34 simultaneously with pumping source 29, and amplifier 34 inserts compressor reducer 30.
Referring to Fig. 2, in the specific embodiment of the utility model, its synchronizing generator 33 comprises first prism 25, second prism 26, Pockers cell 27,5046E Pockers cell driving power 23, DG535 digit pulse time-delay/generator 24, first prism 25, second prism 26 are separately positioned on Pockers cell 27 both sides, 5046E23, DG53524 join with Pockers cell 27 respectively, 5046E23 and DG53524 join, and second prism 26 inserts 5046E23, and DG53524 inserts pumping source 29.Amplifier 34 comprises beam splitter 1, first half-wave plate 2, first polarizer 3, first biconvex lens 4, first vacuum tube 5, second biconvex lens 6, first dichroic mirror 7, bbo crystal 8 is amplified in the second level, first absorption cell 9, high threshold film speculum 10, second half-wave plate 11, second polarizer 12, the 3rd biconvex lens 13, second vacuum tube 14, the 4th biconvex lens 15, second dichroic mirror 16, the first order is amplified bbo crystal 17, second absorption cell 18, the 5th biconvex lens 19, the 6th biconvex lens 20, first changes polariscope 21, speculum 28, the 3rd dichroic mirror 31 and second changes polariscope 32; Be disposed with speculum 28, first on the light path of synchronizing generator 33 outgoing and change polariscope 21, the 6th biconvex lens 20, second dichroic mirror 16, first order amplification bbo crystal 17, the 3rd dichroic mirror 31, the 5th biconvex lens 19, first dichroic mirror 7, second level amplification bbo crystal 8, second commentaries on classics polariscope 32 and the compressor reducer 30; Pumping source 29 is by beam splitter 1 outgoing two-way light, be disposed with first half-wave plate 2, first polarizer 3, first biconvex lens 4, first vacuum tube 5, second biconvex lens 6, second level amplification bbo crystal 8 and first absorption cell 9 on one tunnel light path, be disposed with high threshold film speculum 10, second half-wave plate 11, second polarizer 12, the 3rd biconvex lens 13, second vacuum tube 14, the 4th biconvex lens 15, first order amplification bbo crystal 17 and second absorption cell 18 on another road light path.
Wherein the 6th biconvex lens 20 can be 1,2 or 3, and the 5th biconvex lens 19 is 1,2 or 3.Crystal 8 is amplified in the second level, the first order is amplified crystal 17 and adopted bbo crystal.
When the present invention works, the 360ps of fiber laser 22 outputs, the seed light that centre wavelength is 1053nm are divided into two bundles with Glan prism 24, a branch ofly receive as Pockers cell 27 power supply triggering signals with PIN, another bundle enters Pockers cell 27 to carry out pulse and chooses.Output signal with Pockers cell 27 control power supplys triggers DG535, behind the delayed 170 μ s of a certain output channel of DG535, triggers the Q-switch of pump light, has reached seed Synchronization Control pump light, and synchronization accuracy reaches 500ps.Convert the polarization direction of pulse seed light to horizontal polarization, inject bbo crystal.The pump light that pumping source 29 sends carries out optical parameter with the pulse seed light and amplifies in bbo crystal behind high threshold film speculum, half-wave plate, polarizer, biconvex lens, vacuum tube, the signal pulse after the amplification is compressed near Fourier transform limit with compressor reducer 30.
Referring to Fig. 3～7, this for be 1.5nJ when the seed source single pulse energy, design sketch when repetition rate is 3.8MHz, two-stage pumping light intensity is 350MW/cm
2, energy is 150mJ.Amplification process adopts non-colinear, first kind phase matched mode.Amplification medium adopts bbo crystal, is of a size of 6mm * 6mm * 16mm, and cutting angle is θ=22.86 °, Φ=0 °.The non-colinear angle is 0.67 ° (the crystal exterior angle is 1.1 °).Total net gain reaches 4 * 10
6Final output energy is 6mJ, energy hunting＜2%.
Claims (8)
1, a kind of optical parameter amplification system based on full-optical-fiber laser, it is characterized in that: this amplification system comprises pumping source (29), signal source (22), synchronizing generator (33), amplifier (34) and compressor reducer (30), described signal source (22) triggering synchronous generator (33); Described synchronizing generator (33) control pumping source (29); Described signal source (22) inserts amplifier (34) simultaneously with pumping source (29); Described amplifier (34) inserts compressor reducer (30).
2, the optical parameter amplification system based on full-optical-fiber laser according to claim 1 is characterized in that: described pumping source (29) adopts Seeded PR II 8010 type macro-energy single longitudinal modes to transfer QNd:YAG laser or ps level pumping source.
3, the optical parameter amplification system based on full-optical-fiber laser according to claim 1 is characterized in that: described signal source (22) adopts fiber laser.
4, optical parameter amplification system based on full-optical-fiber laser according to claim 1, it is characterized in that: described synchronizing generator (33) comprises first prism (25), second prism (26), Pockers cell (27), 5046E Pockers cell driving power (23), DG535 digit pulse time-delay/generator (24), described first prism (25), second prism (26) is separately positioned on Pockers cell (27) both sides, described 5046E Pockers cell driving power (23), DG535 digit pulse time-delay/generator (24) joins with Pockers cell (27) respectively, described 5046E Pockers cell driving power (23) joins with DG535 digit pulse time-delay/generator (24), described second prism (26) inserts 5046E Pockers cell driving power (23), and described DG535 digit pulse time-delay/generator (24) inserts pumping source (29).
5, optical parameter amplification system based on full-optical-fiber laser according to claim 1 is characterized in that: described amplifier (34) comprises beam splitter (1), first half-wave plate (2), first polarizer (3), first biconvex lens (4), first vacuum tube (5), second biconvex lens (6), first dichroic mirror (7), crystal (8) is amplified in the second level, first absorption cell (9), high threshold film speculum (10), second half-wave plate (11), second polarizer (12), the 3rd biconvex lens (13), second vacuum tube (14), the 4th biconvex lens (15), second dichroic mirror (16), the first order is amplified crystal (17), second absorption cell (18), the 5th biconvex lens (19), the 6th biconvex lens (20), first changes polariscope (21), speculum (28), the 3rd dichroic mirror (31) and second changes polariscope (32); Be disposed with speculum (28), first on the light path of described synchronizing generator (33) outgoing and change polariscope (21), the 6th biconvex lens (20), second dichroic mirror (16), first order amplification crystal (17), the 3rd dichroic mirror (31), the 5th biconvex lens (19), first dichroic mirror (7), the second amplification crystal (8), second commentaries on classics polariscope (32) and the compressor reducer (30); Described pumping source (29) is by beam splitter (1) outgoing two-way light, be disposed with first half-wave plate (2), first polarizer (3), first biconvex lens (4), first vacuum tube (5), second biconvex lens (6), second level amplification crystal (8) and first absorption cell (9) on one tunnel light path, be disposed with high threshold film speculum (10), second half-wave plate (11), second polarizer (12), the 3rd biconvex lens (13), second vacuum tube (14), the 4th biconvex lens (15), first order amplification crystal (17) and second absorption cell (18) on another road light path.
6, the optical parameter amplification system based on full-optical-fiber laser according to claim 5 is characterized in that: described the 6th biconvex lens (20) is 1,2 or 3.
7, according to claim 5 or 6 described optical parameter amplification systems based on full-optical-fiber laser, it is characterized in that: described the 5th biconvex lens (19) is 1,2 or 3.
8, according to claim 4 or 5 described optical parameter amplification systems based on full-optical-fiber laser, it is characterized in that: crystal (8) is amplified in the described second level, the first order is amplified crystal (17) and is bbo crystal.
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| CNB2006101046864A CN100561808C (en) | 2006-09-30 | 2006-09-30 | Optical Parametric Amplification System Based on All-Fiber Laser |
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| CNB2006101046864A CN100561808C (en) | 2006-09-30 | 2006-09-30 | Optical Parametric Amplification System Based on All-Fiber Laser |
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| CN101820130A (en) * | 2010-04-01 | 2010-09-01 | 中国工程物理研究院激光聚变研究中心 | Method for adjusting non-collinear once chirped pulse optical parameter amplifying system |
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| CN109088671A (en) * | 2018-09-14 | 2018-12-25 | 国网西藏电力有限公司 | One kind is based on the distant pump Er-doped fiber transmission method of chirped bypass and system |
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| CN111822850A (en) * | 2020-07-17 | 2020-10-27 | 西安交通大学 | A multi-beam laser amplification scanning processing system and method based on optical field control |
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| CN111952828B (en) * | 2020-08-21 | 2022-10-14 | 西南交通大学 | Device for improving signal light gain by adopting twin-core and twin-pump optical fiber parametric amplifier |
| CN112615244A (en) * | 2020-12-16 | 2021-04-06 | 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） | Medium wave single resonance optical frequency conversion device |
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|---|---|---|---|---|
| CN1219790A (en) * | 1997-12-10 | 1999-06-16 | 三星电子株式会社 | Fiber Amplifiers Using Synchronous Reference Filters |
| JP2000244044A (en) * | 1999-02-18 | 2000-09-08 | Communication Research Laboratory Mpt | Regenerative mode synchronous laser using fabry-perot filter |
| CN201015020Y (en) * | 2006-09-30 | 2008-01-30 | 中国科学院西安光学精密机械研究所 | Optical Parametric Amplification System Based on All-Fiber Laser |
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