CN1119846C - Ultrashort pulse chirped optical parameter laser - Google Patents
Ultrashort pulse chirped optical parameter laser Download PDFInfo
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- CN1119846C CN1119846C CN 00105431 CN00105431A CN1119846C CN 1119846 C CN1119846 C CN 1119846C CN 00105431 CN00105431 CN 00105431 CN 00105431 A CN00105431 A CN 00105431A CN 1119846 C CN1119846 C CN 1119846C
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- 230000003287 optical effect Effects 0.000 title claims abstract description 40
- 239000013078 crystal Substances 0.000 claims abstract description 77
- 238000005086 pumping Methods 0.000 claims abstract description 21
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 7
- 239000010437 gem Substances 0.000 claims description 7
- 229910001751 gemstone Inorganic materials 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 239000010936 titanium Substances 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910013641 LiNbO 3 Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- -1 lithium strontium aluminium fluoride class Chemical class 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Abstract
The invention relates to a parameter laser, in particular to a chirped femtosecond optical parameter laser. The ultra-short pulse chirped optical parameter laser comprises a chirped optical parameter generator consisting of an electro-optic beam scanner, a prism beam deflector, a nonlinear laser crystal and a laser pumping light source, and a femtosecond optical parameter amplifier consisting of a hollow cylindrical lens or a half-cylindrical lens, the nonlinear laser crystal, the pumping light source and a chirped optical pulse width compressor, wherein the two are combined to form the ultra-short pulse chirped optical parameter laser. The structure is simple, the price is low, the practicability is strong, and the ultra-high power ultra-short pulse full-curing laser can be made.
Description
The present invention relates to a kind of parametric laser, particularly relate to the femtosecond light parametric laser of warbling.
The femtosecond ultra-short pulse laser is the best means of each subject such as physics, biology, medical science, chemistry and each application research ultrafast process.Ultrashort pulse can realize terawatt (TW) level ultra high power laser, is the instrument of the superpower process of research.Ultra-short pulse laser and ultra-intense laser are the great research directions of present laser field.
The technology that produces the femtosecond light laser at present is to use mode-locking technique to produce the femto-second laser pulse sequence, then its broadening is become nanosecond subnanosecond chirped pulse to amplify compression again, the Quant-Ray TSA type titanium jewel femtosecond laser amplifier of having put on market since 1993 as U.S. Spectra-Physics company, be 50～80fs of the locked mode femto-second laser generation of argon laser pumping, 82MHz pulse laser broadening behind the pulse broadening becomes the chirped pulse of nanosecond or submicrosecond, this chirped pulse is through isolation/menu device, become 10Hz, inject titanium jewel amplifying stage behind the low-repetition-frequency, after the amplification again through the compression of warbling, obtain the high power femtosecond and amplify pulse, this laser technique complexity, the price height.
The objective of the invention is to overcome the defective of present femtosecond intense pulse laser system very complex, simply constitute the chirp photoparametric generator by electric light optical beam scanner, prismatic light beam deflection device, non-linear laser crystal, laser pumping light source thereby provide a kind of; Constitute the femtosecond photoparametric amplifier by open tubular column lens or half of post lens, non-linear laser crystal, pump light source and chirped light pulse shortener.The two is in conjunction with constituting ultrashort-pulse chirp photoparametric laser device.The present invention has simplified device, has reduced price.
The object of the present invention is achieved like this:
With Fig. 2 is example, carries out deflection scanning by 1 pair of pump beam of electric light optical beam scanner 8, the pump beam deviation that is scanned is incided through prismatic light beam deflection device 4 on the non-linear laser crystal 2 of non-colinear coupling configuration to carry out pumping again.Non-linear laser crystal 2 is placed on optical axis position, and pump light passes the center of non-linear laser crystal 2, has realized the scanning of pump beam incidence angle thus.(optical axis direction is the refractive index match direction) is because the incidence angle scanning of pump beam is the parameter laser of warbling the time thereby produce a parameter laser with incidence angle change wavelength on optical axis direction.The parameter laser 9 that the time that non-linear laser crystal 3 tentatively zooms into output with this parameter laser of warbling warbles, non-linear laser crystal 3 is placed on optical axis position and the symmetric position of non-linear laser crystal 2 with respect to isosceles prism deflection device 5, to guarantee scanning pumping with symmetrical same scan angle by the pump light of nonlinear crystal 2, isosceles prism deflection device 5 is positioned over any off-axis position of energy deviation pump light, and the base is parallel to optical axis.The pulse duration of the parameter laser 9 that the time warbles is the pulses of a nanosecond that adapts with the pump light pulsewidth arriving picosecond range, has so just constituted the parameter laser generator of simply warbling.Open tubular column lens 12 are positioned over the place ahead of parameter laser 9, and parameter laser 9 passes the hollow part of open tubular column lens 12, incide nonlinear crystal 14 and are amplified by parameter, and the focus of plano-convex open tubular column lens 12 is at the center of non-linear laser crystal 14.Amplifying stage pump light 11 converges on the non-linear laser crystal 14 through the non-hollow part of open tubular column lens 12, replaces beam flying, multiple angles of incidence pumping non-linear laser crystal 14 with converging light.The parameter laser 16 that is amplified by non-linear laser crystal 14 enters the ultrashort pulse that chirped light pulse shortener 10 is compressed into ultra high power, can reach TW level femtosecond laser, thereby is a ultrashort-pulse chirp parametric laser.
The incidence angle of the pump light of electric light optical beam scanner scanning non-colinear coupling, optical axis direction is the refractive index match direction, produce the broadband laser pulse of 400nm～700nm that a time warbles at optical axis direction, be compressed into ultrashort femto-second laser pulse through the chirped light pulse shortener.
The present invention is with plano-convex open tubular column lens 12, produce convergent beam, convergent beam has different incidence angles and replaces beam flying (without the electrooptic crystal beam steering), pumping non-linear laser crystal 14, as the wide-band amplifier of warbling, can independently amplify any existing chirped laser.
The parameter laser generator of warbling that the present invention produces with the light beam scan method, the laser pulse of its generation is a broad pulse laser, do not need chirped optical pulse broadening technology and directly enter into photoparametric amplifier to amplify, do not finish pump light and reach the demand of high-precise synchronization and in parameter amplifies, do not need to add the optical delay system, so be the amplification system of a simplification with the parameter pulse of warbling that is exaggerated.
Used non-linear laser crystal can be BBO, LBO or KTP.
The electrooptic crystal of used electric light optical beam scanner is KDP, KD
*P, KTP, MgO
2: LiNbO
3, LiNbO
3, can be single-stage, multistage, linear pattern or turnover type, the electric light optical beam scanner is by synchronous making alive system's control or subtract electrical voltage system control synchronously.
The parameter laser of warbling that produces can be the signal wave of parameteric light or the idle ripple of parameteric light.Can also increase the frequency multiplication element, form the frequency multiplication chirp photoparametric laser device.
Can increase amplifying stage after the chirped laser pulse output, its amplifying stage can be that parameter amplifies, and also can be other laser crystal such as titanium jewel, the laser amplifier of tunable laser crystals such as LiSAF.
All optical elements all are installed on the optical adjusting frame.
Used pump beam 8 is 100ps short-pulse lasers to 2ns, and used pump light wavelength is 1.064 μ m, 532nm or 830nm.
Used chirped light pulse shortener 10 can be the double grating compressor reducer, single gratings compressor or nonlinear optical crystal compressor reducer.
The parameter laser of warbling that the present invention produces can directly enter the amplifier that crystal such as existing chirped laser amplifier such as titanium jewel, lithium strontium aluminium fluoride class constitute.
Ultrashort-pulse chirp photoparametric laser device of the present invention has been simplified existing femtosecond laser technology such as locked mode, broadening, menu, amplification, and is simple in structure, cost is low, efficient is high, can make the laser of small-sized full curing.
The present invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is the Fs chirp photoparametric laser device of embodiment 1,
Fig. 2 is the single-stage ultrashort-pulse chirp photoparametric laser device of embodiment 2,
Fig. 3 is the single-stage ultrashort-pulse chirp photoparametric laser device of embodiment 3,
Fig. 4 is the single-stage ultrashort-pulse chirp photoparametric laser device of embodiment 4,
Fig. 5 is the Fs chirp photoparametric laser amplifier of embodiment 5,
Wherein: (1) electric light optical beam scanner,
(2), (3), (14), (15) non-linear laser crystal,
(4) right-angle prism light beam deflector, (5) isosceles prismatic light beam deflection device,
(6) completely reflecting mirror, (7) broadband completely reflecting mirror, the pump light of (8) incident,
(9) the time parameter laser of warbling, (10) chirped light pulse shortener,
(11) amplifying stage pump light, (12) plano-convex open tubular column lens or half of post lens,
(13) biconvex open tubular column lens or half of post lens,
(16) the parameter laser pulse of warbling that is exaggerated, (17) titanium precious stone laser amplifier,
(18) locked mode ti sapphire laser, (19) chirped light pulse stretcher device.
Embodiment 1:
Make a Fs chirp photoparametric laser device according to Fig. 1.Electric light optical beam scanner 1 scans pump beam 8 fast in the angle scanning mode, through right-angle prism light beam deflector 4 pump beam 8 is incided on the non-linear laser crystal 2 pumping non-linear laser crystal 2 in the mode of angle scanning again.Remaining pump light is through isosceles prismatic light beam deflection device 5 (isosceles prismatic light beam deflection device 5 is on off-axis position), (non-linear laser crystal 3 is placed on the optical axis position to incide non-linear laser crystal 3 in the mode of the angle scanning of same scan speed, on the symmetric position of non-linear laser crystal 2 with respect to isosceles prism deflection device 5) on, pumping non-linear laser crystal 3.Non-linear laser crystal 2 parameteric light that generation time is warbled under pump light incidence angle scan condition.Non-linear laser crystal 3 amplifies its parameter, the parameter laser 9 that generation time is warbled, inciding non-linear laser crystal 14 through the hollow part of open tubular column lens 12 is again amplified by parameter, the hollow part of passing open tubular column lens 13 again incides non-linear laser crystal 15 and is amplified by the secondary parameter, the parameter laser 16 of warbling that is exaggerated enters the ultra-short pulse laser that light pulse shortener 10 is compressed into ultra high power, and its power can reach the TW level.
Laser pumping source 11 converges to non-linear laser crystal 14 through plano-convex open tubular column lens 12 deviations, pumping non-linear laser crystal 14, converge to non-linear laser crystal 15 through biconvex open tubular column lens 13 deviations again, replace incidence angle scanning, pumping non-linear laser crystal with convergent angle.Wherein the focus of plano-convex open tubular column lens 12 is at the center of non-linear laser crystal 14, the symmetrical respectively two focus length place that is placed on biconvex open tubular column lens 13 of non-linear laser crystal 14 and 15 is to guarantee that pump light is with identical deviation convergent angle pumping non-linear laser crystal 14 and 15.
Embodiment 2:
Make a single-stage ultrashort-pulse chirp photoparametric laser device according to Fig. 2, its laser generator part is as described in the embodiment 1, the time that produces is warbled parameter laser 9 through non-linear laser crystal 14 amplifications, and pump light 11 is assembled pumping non-linear laser crystal 14 through plano-convex open tubular column lens 12 deviations.The laser pulse 16 that is exaggerated enters the ultrashort pulse that light pulse shortener 10 is compressed into ultra high power.
Embodiment 3:
Make a single-stage ultrashort-pulse chirp photoparametric laser device according to Fig. 3.Its structure such as embodiment 2.But replace the deflection device of plano-convex open tubular column lens as pump light 11 with the half of post lens 12 of plano-convex, deviation is assembled pumping non-linear laser crystal 14, the parameter laser 9 that amplification time is warbled, parameter laser 16 after the amplification is compressed into ultra high power ultrashort pulse parameter laser through light pulse shortener 10, can reach TW level femtosecond laser.
Embodiment 4:
Make a single-stage ultrashort-pulse chirp photoparametric laser device according to Fig. 4.The femtosecond laser that existing locked mode ti sapphire laser 18 produces becomes the parameter laser 9 that the time warbles through chirped light pulse stretcher device 19 broadenings, incides non-linear laser crystal 14 through the hollow part of plano-convex open tubular column lens 12 and is amplified by parameter.Pump light 11 converges to non-linear laser crystal 14 through the non-hollow part of plano-convex open tubular column lens 12, pumping nonlinear crystal 14, and the parameter laser pulse 16 of warbling that is exaggerated is compressed into the laser of ultra high power ultrashort pulse through light pulse shortener 10.
Embodiment 5:
Make a Fs chirp photoparametric laser device according to Fig. 5.Electric light optical beam scanner 1 scans pump beam 8 fast in the angle scanning mode, through right-angle prism light beam deflector 4 mode of pump beam with angle scanning incided on the non-linear laser crystal 2 again, pumping non-linear laser crystal 2, remaining pump light is converged on the non-linear laser crystal 3 by isosceles prismatic light beam deflection device 5 deviations, pumping non-linear laser crystal 3, its position is as described in the embodiment 1.Non-linear laser crystal 2 produces the parameteric light of the scanning of warbling under the incidence angle scan condition.Non-linear laser crystal 3 amplifies its parameteric light, and the parameter laser 9 that generation time is warbled amplifies through titanium precious stone laser amplifier 17, enters the laser that chirped light pulse shortener 10 is compressed into the ultrashort pulse of ultra high power again, can reach the TW level laser.
Claims (6)
1. ultrashort-pulse chirp photoparametric laser device, it is characterized in that: constitute the chirp photoparametric generator by electric light optical beam scanner (1), the first prismatic light beam deflection device (4) and the second prismatic light beam deflection device (5), first non-linear laser crystal (2) and the second linear non-laser crystal (3), constitute parametric amplifier by plano-convex open tubular column lens (12), non-linear laser crystal (14), both constitute chirp photoparametric laser device, add chirped light pulse shortener (10), constitute ultrashort-pulse chirp photoparametric laser device:
By electric light optical beam scanner (1) pump beam (8) is carried out deflection scanning, through the first prismatic light beam deflection device (4) the pump beam deviation that is scanned is incided on the non-linear laser crystal (2) of non-colinear coupling configuration and carry out pumping, non-linear laser crystal (2) is placed on optical axis position, pump light passes the center of non-linear laser crystal (2), optical axis direction is the refractive index match direction, the parameter laser that produces on optical axis direction with incidence angle change wavelength is the parameter laser of warbling the time, the parameter laser (9) that the time that non-linear laser crystal (3) tentatively zooms into output with this parameter laser of warbling warbles, non-linear laser crystal (3) is placed on optical axis position and the symmetric position of non-linear laser crystal (2) with respect to the second prism deflection device (5), the second prism deflection device (5) is positioned over any off-axis position of energy deviation pump light, the base is parallel to optical axis, the pulse duration of the parameter laser (9) that the time warbles is the pulse of a nanosecond that adapts with the pump light pulsewidth arriving picosecond range, has so just constituted the parameter laser generator of warbling;
Plano-convex open tubular column lens (12) are positioned over the place ahead of parameter laser (9), the hollow part that parameter laser (9) passes open tubular column lens (12), inciding nonlinear crystal (14) is amplified by parameter, the focus of plano-convex open tubular column lens (12) is at the center of the 3rd non-linear laser crystal (14), amplifying stage pump light (11) converges to upward pumping the 3rd non-linear laser crystal (14) of the 3rd non-linear laser crystal (14) through the non-hollow part of open tubular column lens (12), is entered chirped light pulse shortener (10) by the parameter laser (16) of the 3rd non-linear laser crystal (14) amplification and is compressed into the ultrashort pulse of ultra high power and constitutes a ultrashort-pulse chirp parametric laser;
All optical elements all are installed on the optical adjusting frame;
Used pump beam (8) is the short-pulse laser of 100ps to 2ns, and used pump light wavelength is 1.064 μ m, 532nm or 830nm;
Used chirped light pulse shortener (10) can be the double grating compressor reducer, single gratings compressor or nonlinear optical crystal compressor reducer.
2. by the described ultrashort-pulse chirp photoparametric laser device of claim 1, it is characterized in that: on the optical axis direction between the 3rd non-linear laser crystal (14) and the chirped light pulse shortener (10), also add half of post lens (13) of biconvex open tubular column lens or biconvex and the 4th non-linear laser crystal (15) in turn, wherein the 3rd non-linear laser crystal (14), the 4th non-linear laser crystal (15) respectively symmetry be placed on the two focus length place of biconvex open tubular column lens or biconvex one side of something post lens (13).
3. by the described ultrashort-pulse chirp photoparametric laser device of claim 1, it is characterized in that: also change plano-convex open tubular column lens (12) into half of post lens, form a single-stage ultrashort-pulse chirp photoparametric laser device.
4. by the described ultrashort-pulse chirp photoparametric laser device of claim 1, it is characterized in that:
Existing locked mode ti sapphire laser (18) and chirped light pulse stretcher device (19) replace electric light optical beam scanner (1), second non-linear laser crystal (3) and first non-linear laser crystal (2) and the first prismatic light beam deflection device (4) and the second prismatic light beam deflection device (5), form a single-stage ultrashort-pulse chirp photoparametric laser device.
5. by the described ultrashort-pulse chirp photoparametric laser device of claim 1, it is characterized in that: also plano-convex open tubular column lens (12) and the 3rd non-linear laser crystal (14) are replaced to titanium precious stone laser amplifier (17), form a Fs chirp photoparametric laser device.
6. by the described ultrashort-pulse chirp photoparametric laser device of claim 1, it is characterized in that: used non-linear laser crystal is BBO, LBO or KTP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00105431 CN1119846C (en) | 2000-03-28 | 2000-03-28 | Ultrashort pulse chirped optical parameter laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00105431 CN1119846C (en) | 2000-03-28 | 2000-03-28 | Ultrashort pulse chirped optical parameter laser |
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|---|---|
| CN1315765A CN1315765A (en) | 2001-10-03 |
| CN1119846C true CN1119846C (en) | 2003-08-27 |
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| CN 00105431 Expired - Fee Related CN1119846C (en) | 2000-03-28 | 2000-03-28 | Ultrashort pulse chirped optical parameter laser |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322369C (en) * | 2005-01-26 | 2007-06-20 | 中国科学院上海光学精密机械研究所 | Pulse width adjustable ultrashort pulse compression device |
| CN100392925C (en) * | 2005-09-07 | 2008-06-04 | 四川大学 | Multi-pulse superposition amplifier and femtosecond laser parameter chirped pulse amplification laser |
| KR100749342B1 (en) * | 2006-05-26 | 2007-08-14 | 한국과학기술원 | Apparatus for optical parametric chirped pulse amplification(opcpa) using idler and inverse chirping |
| 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 |
| CN102368588B (en) * | 2011-11-08 | 2012-11-14 | 华东师范大学 | Method for improving contrast of ultrashort pulse |
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