CN1560964A - Miniaturized near-collinear near-degenerate OPCPA and CPA mixed type ultrashort ultrastrong laser system - Google Patents
Miniaturized near-collinear near-degenerate OPCPA and CPA mixed type ultrashort ultrastrong laser system Download PDFInfo
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- CN1560964A CN1560964A CNA2004100164154A CN200410016415A CN1560964A CN 1560964 A CN1560964 A CN 1560964A CN A2004100164154 A CNA2004100164154 A CN A2004100164154A CN 200410016415 A CN200410016415 A CN 200410016415A CN 1560964 A CN1560964 A CN 1560964A
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 53
- 239000010936 titanium Substances 0.000 claims abstract description 53
- 239000010437 gem Substances 0.000 claims abstract description 51
- 229910001751 gemstone Inorganic materials 0.000 claims abstract description 50
- 239000013078 crystal Substances 0.000 claims abstract description 31
- 238000005086 pumping Methods 0.000 claims abstract description 27
- 230000001360 synchronised effect Effects 0.000 claims abstract description 26
- 230000006835 compression Effects 0.000 claims abstract description 17
- 238000007906 compression Methods 0.000 claims abstract description 17
- 230000008676 import Effects 0.000 claims description 6
- 230000001172 regenerating effect Effects 0.000 claims description 5
- 230000003321 amplification Effects 0.000 abstract description 16
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 16
- 229910052594 sapphire Inorganic materials 0.000 abstract 1
- 239000010980 sapphire Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 230000000295 complement effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 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
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
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Abstract
A miniaturized near collinear near degeneracy OPCPA and CPA mixed type ultrashort ultrastrong laser system comprises a titanium jewel femtosecond mode-locked pulse oscillator, a pulse stretcher, an OPCPA amplification stage pumping source, an OPCPA amplification stage, a CPA amplification stage and a vacuum compressor, and is characterized in that the pulse stretcher is arranged behind the titanium jewel femtosecond mode-locked pulse oscillator, two paths of pulses output by the pulse stretcher respectively enter the OPCPA amplification stage pumping source and the OPCPA amplification stage, and the OPCPA amplification stage pumping source is a synchronous pumping source and sequentially consists of an amplifier, a frequency multiplier and a dichroscope; the OPCPA amplifying stage consists of a dichroic mirror, an LBO crystal and a dichroic mirror in sequence; the CPA amplification stage consists of a titanium sapphire multi-pass amplifier and a Q-switching frequency-doubling YAG laser. The invention has the advantages of high gain of OPCPA, easy alignment of signal light and pump light, simple system adjustment, high pump light intensity, low B integral of the system, high reducibility of pulse compression and the like.
Description
Technical field:
The present invention relates to ultrashort ultra-intense laser system, the particularly a kind of optical parameter chirped pulse amplification (hereinafter to be referred as OPCPA) of the nearly degeneracy of nearly conllinear and miniaturization mixed type laser system that chirped pulse amplifies (hereinafter to be referred as CPA) principle utilized goes for fields such as ultrashort ultra-intense laser device research and ultrashort ultra-intense laser application.
Background technology:
Ultrashort ultra-intense laser science is with the development of superpower ultrashort laser, the interaction of ultrashort ultra-intense laser and material, and be object with basis, forward position in the relevant high-tech sector in cross discipline, be important science frontier field, the ultrashort ultra-intense laser of miniaturization system that wherein can the output high-power pulse is the basic equipment of ultrashort ultra-intense laser scientific domain research.The ultrashort ultra-intense laser of miniaturization system adopts the titanium sapphire laser system of CPA technology at present, its output energy can reach the 1J magnitude at present, pulse duration is general＞30fs, operating frequency generally is 10Hz, the output pulse peak power can reach the magnitude of 100TW, if the pulse signal to noise ratio does not adopt special measure to be approximately 10
3, generally be 10
5In order to improve the pulse signal to noise ratio, the someone has proposed non-degenerate OPCPA of miniaturization non-colinear and the ultrashort ultra-intense laser of CPA mixed type system.In technology formerly, people such as the breadboard Jovanovic.I of U.S. livre More provide a kind of non-degenerate OPCPA of typical miniaturization non-colinear and CPA mix mode laser system (Optics Letters, Vol.27, No.18,529-535,2002, UCRL-JC-146224,2001), its light path arrangement as shown in Figure 1.Titanium jewel mode locking oscillator 1 output center wavelength is at～820nm, pulsewidth is pulsewidth～600ps for the mode locking pulse of～20fs by stretcher 2 broadenings, the chirped pulse of energy～0.5nJ, inject OPCPA amplifying stage 13 by speculum 3 and speculum 4 reflection backs as flashlight, and adopt the q-multiplier YAG laser 5 output pulse widths～6.9ns of a platform independent, energy be the 532nm pulse of 1.5J by energy attenuator 6 decay back as pump light to inject OPCPA amplifying stage 13 simultaneously with the flashlight non-colinear that has a certain degree, OPCPA amplifying stage 13 is by bbo crystal 7, bbo crystal 11, speculum 8, speculum 9, speculum 10 and speculum 12 are formed, bbo crystal 7 and bbo crystal 11 all are operated under the mode of non-colinear I saphe coupling, by the flashlight energy～2mJ after 13 amplifications of OPCPA amplifying stage, inject CPA titanium jewel by speculum 14 reflection backs and lead to amplifying stage 16 more, and at the remaining 532nm pump light of OPCPA amplifying stage 13 output equally as the CPA titanium jewel pump light of logical amplifying stage 16 how, how logical amplifying stage 16 of CPA titanium jewels is injected in the mirror 15 reflection backs that are reflected.Obtain after amplifying by the how logical amplifying stage 16 of CPA titanium jewel～flashlight of 45mJ, in the last injected pulse compressor reducer 17, by the ultrashort pulse of pulse shortener 17 last output pulse width～60fs.
In above-mentioned laser system, be characterized in that the OPCPA amplifying stage partly adopts the bbo crystal I class non-colinear nondegenerate position structure that is complementary, adopt independently laser as the pumping source of OPCPA amplifying stage, though it is relatively simple for structure, the use device is few, but major defect is owing to use the non-colinear structure, the OPCPA process is very responsive to non-colinear angle, regulate difficulty, add and adopt independently pumping source, make that the time synchronized between signal pulse and the pumping pulse is bad, OPCPA amplifying stage 13 job insecurities.And because time synchronized bad (generally being the 1ns magnitude), generally need the wide pumping pulse of long pulse, therefore just need with the more pumping pulse of macro-energy to obtain high efficiency OPCPA in order to obtain same high pump power, and adopt bbo crystal non-colinear position to be complementary, the crystal damage threshold value is low, makes the low (＜1GW/cm of pump light intensities
2), the gain coefficient of OPCPA is low, and it is low to cause the OPCPA amplifying stage partly to amplify efficient.If in follow-up CPA amplifying stage 16, adopt saturated amplification to stablize output, but can increase the B integration of system, make that the reproducibility of pulse compression is poor.In technology formerly, it is poor that the reproducibility of compression afterpulse is amplified in pulse in miniaturization OPCPA and the CPA mixed type laser system, only pushes back 60fs from initial 20fs.
Summary of the invention:
The present invention provides the OPCPA and the ultrashort ultra-intense laser of the CPA mixed type system of the nearly degeneracy of the nearly conllinear of a kind of miniaturization in order to overcome existing deficiency in the above-mentioned technology formerly.
Principle of the present invention is to utilize the nearly degeneracy optical parameter of nearly conllinear chirped pulse to amplify the amplification that (OPCPA) principle realizes broadband laser pulse, utilize traditional chirped pulse to amplify the macro-energy amplification that (CPA) principle realizes laser pulse, in conjunction with both advantages, finally realize whole laser system output ultrashort, super strong laser pulse.The OPCPA amplifying stage partly adopts the nearly degeneracy of nonlinear crystal (LBO) the nearly conllinear of the I class position structure that is complementary, the pump light of flashlight in the OPCPA amplifying stage and the output of OPCPA amplifying stage synchronous pump source is from same laser, the method of synchronization adopts phototiming, realizes that the broadband amplification of OPCPA amplifying stage and the energy of CPA amplifying stage amplify.
Technical solution of the present invention is as follows:
The OPCPA of the nearly degeneracy of the nearly conllinear of a kind of miniaturization and the ultrashort ultra-intense laser of CPA mixed type system, comprise titanium jewel femtosecond mode locking pulse oscillator, pulse stretcher, OPCPA amplifying stage pumping source, OPCPA amplifying stage, CPA amplifying stage and vacuum compression device, after it is characterized in that described pulse stretcher places titanium jewel femtosecond mode locking pulse oscillator, its output two-way pulse enters OPCPA amplifying stage pumping source and OPCPA amplifying stage respectively, described OPCPA amplifying stage pumping source is the synchronous pump source, is made up of amplifier, frequency multiplier and dichroic mirror successively; Described OPCPA amplifying stage is made up of dichroic mirror, lbo crystal and dichroic mirror successively; Described CPA amplifying stage is by titanium jewel multi-pass amplifier and pumping q-multiplier YAG laser constitution thereof; The position relation of above-mentioned each component is as follows: after described pulse stretcher places titanium jewel femtosecond mode locking pulse oscillator, broadening and beam splitting are carried out in pulse to input, its output is divided into two-way, wherein a branch of amplifier that enters in the OPCPA amplifying stage synchronous pump source amplifies, through the frequency multiplier frequency multiplication, from fundamental frequency light, separate and import frequency doubled light in the OPCPA amplifying stage by dichroic mirror thereafter again, another bundle directly enters the OPCPA amplifying stage, this OPCPA amplifying stage will import lbo crystal and dichroic mirror thereafter from the light in stretcher and OPCPA amplifying stage synchronous pump source jointly by dichroic mirror, after the CPA amplifying stage places the OPCPA amplifying stage, this CPA amplifying stage is made up of titanium jewel multi-pass amplifier and q-multiplier YAG laser pump source, and the vacuum compression device places after the CPA amplifier.
When described dichroic mirror will import lbo crystal jointly from the frequency multiplication pump light in the flashlight of stretcher and OPCPA amplifying stage synchronous pump source, its incidence angle was～0.5 °.
Between OPCPA amplifying stage and CPA amplifying stage, be provided with the speculum of leaded light.
In the described OPCPA amplifying stage synchronous pump source amplifier form by titanium jewel regenerative amplifier and titanium jewel preamplifier, and respectively by a q-multiplier YAG laser pumping.
Can adopt polylith lbo crystal polyphone to constitute in the described OPCPA amplifying stage.
In the described CPA amplifying stage, can adopt multistage titanium jewel multi-pass amplifier and corresponding q-multiplier YAG laser pump source thereof to form.
Compare with first technology, the present invention has outstanding feature:
(1) the OPCPA amplifying stage adopts the nearly degeneracy of the lbo crystal nearly conllinear of the I class position structure that is complementary.Adopt nearly collinear structure, the ratio of gains non-colinear structure height of OPCPA, flashlight and pump light are aimed at easily, and system regulates simple.Adopt lbo crystal, pump light intensities can be high, makes OPCPA amplifier section amplify the efficient height, effectively reduces the pressure of follow-up CPA amplifier, reduces the B integration of system, improves the reproducibility of pulse compression;
(2) at the 800nm wave band, the pump light of flashlight in the OPCPA amplifier and the output of OPCPA amplifying stage synchronous pump source is from same laser, the method of synchronization adopts phototiming, the synchronization accuracy height (＜10ps), the pulse duration of pump light can be enough narrow, and more bigger than the pulse duration of flashlight, make in order to obtain same high pump power lowlyer to obtain the needed pumping pulse energy of high efficiency OPCPA, and make OPCPA amplifying stage working stability.
Description of drawings:
Fig. 1 is the structural representation of non-degenerate OPCPA of the non-colinear of technology miniaturization formerly and the ultrashort ultra-intense laser of CPA mix mode system.
Fig. 2 is the OPCPA of the nearly degeneracy of the nearly conllinear of miniaturization of the present invention and the structural representation of the ultrashort ultra-intense laser system embodiment 1 of CPA mix mode.
Fig. 3 is the OPCPA of the nearly degeneracy of the nearly conllinear of miniaturization of the present invention and the structural representation of the ultrashort ultra-intense laser system embodiment 2 of CPA mix mode
Embodiment:
At first see also Fig. 2, Fig. 2 is the OPCPA of the nearly degeneracy of the nearly conllinear of miniaturization of the present invention and the structural representation of the ultrashort ultra-intense laser system embodiment 1 of CPA mix mode.As seen from the figure, the OPCPA of the nearly degeneracy of the nearly conllinear of miniaturization of the present invention and the ultrashort ultra-intense laser of CPA mixed type system mainly comprise: titanium jewel femtosecond mode locking pulse oscillator 18, pulse stretcher 19, OPCPA amplifying stage synchronous pump source 20, OPCPA amplifying stage 26, speculum 28, CPA amplifying stage 31 and vacuum compression device 32.Wherein OPCPA amplifying stage synchronous pump source 20 is made up of amplifier 21, frequency multiplier 22 and dichroic mirror 23.OPCPA amplifying stage 26 is made up of dichroic mirror 24, lbo crystal 25 and dichroic mirror 27.CPA amplifying stage 31 is made up of titanium jewel multi-pass amplifier 30 and q-multiplier YAG laser 29.After pulse stretcher 19 places titanium jewel femtosecond mode locking pulse oscillator 18, broadening and beam splitting are carried out in pulse to its output, output two-way pulse enters respectively in thereafter the OPCPA amplifying stage synchronous pump source 20 and OPCPA amplifying stage 26, wherein a branch of amplifier 21 that at first enters in the OPCPA amplifying stage synchronous pump source 20 amplifies, place thereafter frequency multiplier 22 with the pulse frequency multiplication, thereafter dichroic mirror 23 is separated frequency doubled light and is imported in the OPCPA amplifying stage 26 from fundamental frequency light, after OPCPA amplifying stage 26 places stretcher 19 and OPCPA amplifying stage synchronous pump source 20, will import lbo crystal 25 and dichroic mirror thereafter 27 jointly from the light in stretcher 19 and OPCPA amplifying stage synchronous pump source 20 by dichroic mirror 24.After CPA amplifying stage 31 places OPCPA amplifying stage 26, wherein titanium jewel multi-pass amplifier 30 is used for the light pulse amplification, and q-multiplier YAG laser 29 is used for pumping titanium jewel multi-pass amplifier 30, after vacuum compression device 32 places CPA amplifier 31, is used for light pulse is compressed.
As mentioned above, the course of work of system of the present invention is as follows:
Titanium jewel femtosecond mode locking pulse oscillator 18 produces the ultrashort mode locking pulse row of 800nm wave band～10fs magnitude, pulse stretcher 19 with titanium jewel femtosecond mode locking pulse oscillator 18 output～10fs locked mode ultra-short pulse-width expansion is the broadband chirped pulse, separated into two parts is imported respectively in OPCPA amplifying stage synchronous pump source 20 and the OPCPA amplifying stage 26 then, OPCPA amplifying stage synchronous pump source 20 produces the 400nm arrowband macro-energy pumping pulse that needs in the OPCPA amplifying stage 26, wherein amplifier 21 amplifies the 800nm broadband chirped pulse shaping of input the narrow-band impulse of back output 800nm, again by output 400nm narrow-band impulse after frequency multiplier 22 frequencys multiplication, make the transmittance of 800nm wavelength and the light reflection of 400nm wavelength by dichroic mirror 26 again, separately with the frequency doubled light of the laser of 800nm and 400nm.OPCPA amplifying stage 26 utilizes the OPCPA principle, amplify by the pump light of 400nm broadband chirped pulse 800nm, wherein dichroic mirror 24 makes the broadband light transmission of 800nm wavelength and the light reflection of 400nm wavelength, the broadband signal light of 800nm and the pump light of 400nm just can output on the lbo crystal 25 by 24 one-tenth nearly conllinear of dichroic mirror, lbo crystal 25 is according to the nearly degeneracy phase-matching angle of the nearly conllinear of the I class degree cutting of satisfying 400nm pump light and 800nm flashlight, make that producing the OPCPA process amplifies 800nm broadband signal light, dichroic mirror 27 reflects and the transmittance of 400nm wavelength the broadband light of 800nm wavelength, 800nm broadband signal light is separated from the pump light of 400nm, CPA amplifying stage 31 will further carry out macro-energy and amplify by the 800nm broadband chirped pulse of OPCPA amplifying stage output, wherein titanium jewel multi-pass amplifier 30 is by the 532nm laser pulse pumping of q-multiplier YAG laser 29 outputs, vacuum compression device 32 is compressed to the macro-energy chirped pulse of CPA amplifying stage 31 outputs～pulse of 10fs magnitude in a vacuum, produces the output of ultrashort superpower pulse.
The OPCPA of the nearly degeneracy of the nearly conllinear of above-mentioned miniaturization and the ultrashort ultra-intense laser of CPA mixed type system, concrete job step can be summarized as follows:
(1) titanium jewel femtosecond mode locking pulse oscillator 18 produces the ultrashort mode locking pulse row of 800nm wave band, and pulse duration can arrive the magnitude of 10fs, spectral width＞60nm;
(2) ultrashort pulse of titanium jewel femtosecond mode locking pulse oscillator 18 outputs is listed as by being divided into two beamwidth band chirped pulses behind pulse stretcher 19 broadenings, inject respectively on the dichroic mirror 24 of the amplifier 21 in OPCPA amplifying stage synchronous pump source 20 and OPCPA amplifying stage 26, respectively as pump light light source and the flashlight of OPCPA;
(3) the 800nm broadband chirped pulse in the input amplifier 21 is by the spectrum and the time shaping of pulse, 800nm wave band narrow-band impulse after output is amplified produces the 400nm narrow-band impulse by frequency multiplier 22 frequencys multiplication and incides on the dichroic mirror 23, injects on the dichroic mirror 24 of OPCPA amplifying stage 26 by dichroic mirror 23 reflections;
(4) 800nm broadband, another road chirped pulse from pulse stretcher 19 outputs incides the nearly degeneracy OPCPA of the nearly conllinear of realization the lbo crystal 25 with minimum angle (general～0.5 °) simultaneously as the direct incident of the flashlight of OPCPA and through the arrowband pumping pulse of dichroic mirror 24 and 400nm, after lbo crystal 25 amplifications, flashlight and pump light incide on the dichroic mirror 27,400nm arrowband pump light sees through dichroic mirror 27, and 800nm broadband chirped pulse is reflexed on the speculum 28 by dichroic mirror 27 as flashlight;
(5) by speculum 28 reflections, 800nm broadband chirped pulse is injected in the CPA amplifying stage 31, by being amplified by the titanium jewel multi-pass amplifier 30 of q-multiplier YAG laser 29 pumpings in the CPA amplifying stage 31, the 800nm broadband chirped pulse that is exaggerated is injected in the vacuum compression device 32;
(6) chirped pulse compression in macro-energy broadband is reduced to ultrashort superpower 10fs magnitude pulse in vacuum compression device 32, the ultrashort, super strong laser pulse of last whole system output high-energy short pulse duration.
In the present invention, also can adopt the titanium jewel femtosecond mode locking pulse oscillator 18 of output pulse width, also corresponding the broadening of width of corresponding last compression pulse than broad (for example tens fs).Amplifier 21 in the OPCPA amplifying stage synchronous pump source 20 is used for that high-gain is carried out in the pulse of 800nm wave band and amplifies and the shaping of spectrum time, can adopt casacade multi-amplifier to form, to increase the ability of amplifying pulse, generally can adopt titanium jewel regenerative amplifier and one-level titanium jewel amplifier to form.Also can adopt polylith lbo crystal polyphone in the OPCPA amplifying stage 26, also can adopt the mode of multistage titanium jewel amplifier polyphone in the CPA amplifying stage 31, make pulse energy further to be amplified, obtain the more output of macro-energy.
Fig. 3 is the OPCPA of the nearly degeneracy of the nearly conllinear of miniaturization of the present invention and the structural representation of the ultrashort ultra-intense laser system embodiment 2 of CPA mix mode, it adopts output pulse width～10fs, the titanium jewel femtosecond mode locking pulse oscillator 18 of centre wavelength～800nm, by pulse stretcher 19 respectively output pulse width～600ps (～125pJ) and～(～250pJ) broadband chirped pulse injects OPCPA amplifying stage synchronous pump source 20 and OPCPA amplifying stage 26 respectively to 300ps, the two-stage titanium jewel amplifier 21 that in OPCPA amplifying stage synchronous pump source 20, adopts titanium jewel regenerative amplifier 211 and titanium jewel preamplifier 212 to form, adopting output 532nm pulse energy is the q-multiplier YAG laser 213 of 400mJ and q-multiplier YAG laser 214 difference pumping titanium jewel regenerative amplifier 211 and the titanium jewel preamplifiers 212 of 1.2J, export at last～100mJ (～600ps) 400nm narrow-band impulse by shaping of pulse spectrum time and frequency multiplier 22 frequencys multiplication, incide in the OPCPA amplifying stage 26 by the pump light of dichroic mirror 23 reflection backs as OPCPA, in OPCPA amplifying stage 26, adopt lbo crystal 251 and lbo crystal 251 series arrangement, amplify the back by dichroic mirror 27 outputs by the pulse that dichroic mirror 24 is introduced by lbo crystal 251 and lbo crystal 252, (～800nm broadband chirped pulse 300ps) is again by speculum 28 injection CPA amplifying stages 31 for OPCPA amplifying stage 26 output～2mJ, in CPA amplifying stage 31, adopt titanium jewel multi-pass amplifier 301 and titanium jewel multi-pass amplifier 302 to form two-stage titanium jewel multi-pass amplifier 30, the 532nm pulsed laser energy of q-multiplier YAG laser 291 in CPA amplifying stage 31 and 292 outputs of q-multiplier YAG laser is respectively 800mJ and 8J, as pump light difference pumping titanium jewel multi-pass amplifier 301 and titanium jewel multi-pass amplifier 302, amplification by titanium jewel multi-pass amplifier in the CPA amplifying stage 31, can obtain～2J (～300ps) 800nm broadband chirped pulse output at last, can obtain energy＞1J after injecting 32 compressions of vacuum compression device, the ultrashort superpower pulse of the 800nm of pulse duration～20fs, its peak power can＞50TW.
Claims (6)
1, the OPCPA of the nearly degeneracy of the nearly conllinear of a kind of miniaturization and the ultrashort ultra-intense laser of CPA mixed type system, comprise titanium jewel femtosecond mode locking pulse oscillator (18), pulse stretcher (19), OPCPA amplifying stage pumping source (20), OPCPA amplifying stage (26), CPA amplifying stage (31) and vacuum compression device (32), after it is characterized in that described pulse stretcher (19) places titanium jewel femtosecond mode locking pulse oscillator (18), its output two-way pulse enters OPCPA amplifying stage pumping source (20) and OPCPA amplifying stage (26) respectively, and described OPCPA amplifying stage pumping source (20) is successively by amplifier (21), frequency multiplier (22) and dichroic mirror (23) are formed; Described OPCPA amplifying stage (26) is made up of dichroic mirror (24), lbo crystal (25) and dichroic mirror (27) successively; Described CPA amplifying stage (31) is made up of titanium jewel multi-pass amplifier (30) and q-multiplier YAG laser (29); The position relation of above-mentioned each component is as follows: after described pulse stretcher (19) places titanium jewel femtosecond mode locking pulse oscillator (18), broadening and beam splitting are carried out in pulse to input, its output is divided into two-way, wherein a branch of amplifier (21) that at first enters in the OPCPA amplifying stage synchronous pump source (20) amplifies, through frequency multiplier (22) frequency multiplication, by dichroic mirror (23) thereafter frequency doubled light is separated and imported from fundamental frequency light in the OPCPA amplifying stage (26) again, another bundle directly enters OPCPA amplifying stage (26), this OPCPA amplifying stage (26) will import lbo crystal (25) and dichroic mirror thereafter (27) from the light in stretcher (19) and OPCPA amplifying stage synchronous pump source (20) jointly by dichroic mirror (24), after CPA amplifying stage (31) places OPCPA amplifying stage (26), this CPA amplifying stage (31) is made up of titanium jewel multi-pass amplifier (30) and q-multiplier YAG laser (29), and vacuum compression device (32) places CPA amplifier (31) afterwards.
2, the OPCPA of the nearly degeneracy of the nearly conllinear of miniaturization according to claim 1 and the ultrashort ultra-intense laser of CPA mixed type system, when it is characterized in that described dichroic mirror (24) will import lbo crystal (25) jointly from the frequency multiplication pump light in the flashlight of stretcher (19) and OPCPA amplifying stage synchronous pump source (20), its incidence angle is～0.5 °.
3, the OPCPA of the nearly degeneracy of the nearly conllinear of miniaturization according to claim 1 and the ultrashort ultra-intense laser of CPA mixed type system is characterized in that being provided with the speculum (28) of leaded light between OPCPA amplifying stage (26) and CPA amplifying stage (31).
4, the OPCPA of the nearly degeneracy of the nearly conllinear of miniaturization according to claim 1 and the ultrashort ultra-intense laser of CPA mixed type system, it is characterized in that in the described OPCPA amplifying stage synchronous pump source (20) amplifier (21) form by titanium jewel regenerative amplifier (211) and titanium jewel preamplifier (212), and respectively by q-multiplier YAG laser (213) and q-multiplier YAG laser (214) pumping.
5, the OPCPA of the nearly degeneracy of the nearly conllinear of miniaturization according to claim 1 and the ultrashort ultra-intense laser of CPA mixed type system is characterized in that the lbo crystal (25) in OPCPA amplifying stage 26 adopts polylith lbo crystal polyphone to constitute.
6, the OPCPA of the nearly degeneracy of the nearly conllinear of miniaturization according to claim 1 and the ultrashort ultra-intense laser of CPA mixed type system, it is characterized in that in CPA amplifying stage (31) described titanium jewel multi-pass amplifier (30) adopts multistage titanium jewel multi-pass amplifier (301) and corresponding q-multiplier YAG laser (291) pumping source thereof to form.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100399649C (en) * | 2006-07-14 | 2008-07-02 | 中国科学院上海光学精密机械研究所 | High-energy femtosecond laser pulse external cavity compression device |
| CN100410797C (en) * | 2006-09-04 | 2008-08-13 | 中国科学院上海光学精密机械研究所 | Device and method for generating high repetition frequency ultrashort ultrastrong laser pulse train |
| DE102009028819A1 (en) | 2009-08-21 | 2011-02-24 | Forschungsverbund Berlin E.V. | Apparatus for frequency conversion of laser radiation by four-wave mixing, comprises quasi-phase matching medium equipped with hollow cylinder during four-wave mixing of light waves |
| CN103066484A (en) * | 2012-12-27 | 2013-04-24 | 中国科学院上海光学精密机械研究所 | CPA and OPCPA mixed type ultra high power femtosecond laser system |
| CN103199426A (en) * | 2013-03-06 | 2013-07-10 | 中国科学院上海光学精密机械研究所 | CPA, CPRA and optical parametric chirped pulse amplification (OPCPA) mixing type ultrahigh peak power laser pulse amplifying device |
| CN103926779A (en) * | 2014-01-21 | 2014-07-16 | 中国科学院上海光学精密机械研究所 | High-contrast chirped pulse amplification device |
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2004
- 2004-02-18 CN CN 200410016415 patent/CN1270415C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100399649C (en) * | 2006-07-14 | 2008-07-02 | 中国科学院上海光学精密机械研究所 | High-energy femtosecond laser pulse external cavity compression device |
| CN100410797C (en) * | 2006-09-04 | 2008-08-13 | 中国科学院上海光学精密机械研究所 | Device and method for generating high repetition frequency ultrashort ultrastrong laser pulse train |
| DE102009028819A1 (en) | 2009-08-21 | 2011-02-24 | Forschungsverbund Berlin E.V. | Apparatus for frequency conversion of laser radiation by four-wave mixing, comprises quasi-phase matching medium equipped with hollow cylinder during four-wave mixing of light waves |
| CN103066484A (en) * | 2012-12-27 | 2013-04-24 | 中国科学院上海光学精密机械研究所 | CPA and OPCPA mixed type ultra high power femtosecond laser system |
| CN103199426A (en) * | 2013-03-06 | 2013-07-10 | 中国科学院上海光学精密机械研究所 | CPA, CPRA and optical parametric chirped pulse amplification (OPCPA) mixing type ultrahigh peak power laser pulse amplifying device |
| CN103926779A (en) * | 2014-01-21 | 2014-07-16 | 中国科学院上海光学精密机械研究所 | High-contrast chirped pulse amplification device |
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