CN201118090Y - Chirp pulse amplification laser apparatus - Google Patents
Chirp pulse amplification laser apparatus Download PDFInfo
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- CN201118090Y CN201118090Y CNU2007200809327U CN200720080932U CN201118090Y CN 201118090 Y CN201118090 Y CN 201118090Y CN U2007200809327 U CNU2007200809327 U CN U2007200809327U CN 200720080932 U CN200720080932 U CN 200720080932U CN 201118090 Y CN201118090 Y CN 201118090Y
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- gratings
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Abstract
The utility model provides a chirped pulse amplifying laser, comprising a grating stretcher, a doped glass amplifier, a spatial filter, a soft aperture slot combination and a gratings compressor, which is characterized in that: the laser beam output by the doped glass amplifier conducts beam expanding, wave filtration and beam shaping with the soft aperture slot combination through the spatial filter, so the round beam section is shaped into elliptic beam section, the long axis is parallel with the stripes of the compressor gratings, the length is less than the size of the compressor gratings and the short axis is still equal to the semi-diameter of the round beam section before beam expanding. Thus, the size utilization ratio of the gratings in parallel with the stripe direction can be improved on the compressor gratings, the effective area of the gratings is increased, and the ultrashort pulse laser with more energy and higher power is output when the gratings damaged threshold and the size are same.
Description
Technical field
The utility model belongs to macro-energy high power ultra-short pulse laser field, is specifically related to a kind of chirped pulse amplifying laser device, its objective is to produce the macro-energy high power ultra-short pulse laser.
Background technology
Macro-energy high power ultra-short pulse laser technology provides new technological means for studying inertial confinement fusion and physics problems such as light and material effect.Obtain the macro-energy high power ultra-short pulse laser at present and must adopt chirped pulse amplification, the operation principle that chirped pulse amplifies in the prior art is, the grating stretching device is the chirped pulse of nanosecond with subpicosecond level short pulse broadening, annotate the neodymium glass amplifier and carried out the energy amplification, nanosecond chirped pulse after will amplifying again injects gratings compressor and carries out pulse compression output psec or subpicosecond level short pulse, thereby obtains the macro-energy high power ultra-short pulse laser.
The compressor reducer grating of the chirped pulse amplifying device in the prior art is owing to the grating damage threshold, and the energy density on the grating face has a upper limit, has therefore limited the output energy of device.Light beam projecting face on the compressor reducer grating has only made full use of the size of grating perpendicular to stripe direction, has but wasted the size that is parallel to stripe direction significantly, and it is very low that effective area accounts for the area of raster ratio.
Summary of the invention
The purpose of this utility model is will be under compressor reducer grating damage threshold and measure-alike situation, obtains to amplify more more high power ultra-short pulse laser of macro-energy than prior art chirped pulse.
Technical solution of the present utility model is as follows:
A kind of chirped pulse amplifying laser device comprises grating stretching device, neodymium glass amplifier and gratings compressor, and the three connects successively.Between neodymium glass amplifier and gratings compressor, also be provided with and be used for laser pulse is carried out filtering, the spatial filter that expands bundle, light beam integer and soft aperture slot combination.
Described spatial filter is made up of the aperture on two confocal lens and the focal position.
Described soft aperture slot is provided with oval light hole.
The grating stretching device is the nanosecond chirped pulse with subpicosecond level short pulse broadening and annotated the neodymium glass amplifier and carry out the energy amplification that the nanosecond chirped pulse after will amplifying again injects spatial filter and soft aperture slot combination carrying out filtering, expands bundle, beam shaping.At last the elliptical beam cross section nanosecond chirped pulse after the shaping is injected gratings compressor output psec or subpicosecond level short pulse.
Spatial filter of the present utility model and soft aperture slot combination are carried out filtering, are expanded bundle, beam shaping laser beam, lasing aperture is formed ellipse from rounding, make transverse be parallel to the compressor reducer grating fringe, be no more than raster size on the length, minor axis equals to expand Shu Qianyuan beam cross section radius.On the compressor reducer grating, just can improve the utilance that grating is parallel to the stripe direction size like this, increase the grating effective area, under identical damage threshold and size situation, export more more high power ultra-short pulse laser of macro-energy.
Description of drawings
Fig. 1 is the structured flowchart of chirped pulse amplifying laser device of the present utility model
Fig. 2 is the gratings compressor structural representation in the chirped pulse amplifying laser device of the present utility model
Fig. 3 is the compressor reducer grating effective area operating position schematic diagram in the chirped pulse amplifying laser device of the present utility model
Among the figure: 1. grating stretching device 2. neodymium glass amplifiers, 3. spatial filters and soft aperture slot make up 4. gratings compressors 5. and advance on the compressor reducer beam cross section 6. little gratings the big grating (12,13) of the little grating in light beam perspective plane (11,14) on the 7. big gratings of light beam perspective plane
Embodiment
Among Fig. 1, the utility model chirped pulse amplifying laser device, form with soft aperture slot combination 3 and gratings compressor 4 by grating stretching device 1, neodymium glass amplifier 2, spatial filter, grating stretching device 1, neodymium glass amplifier 2 and gratings compressor 4 are connected successively, are provided for laser pulse is carried out filtering, the spatial filter that expands bundle, light beam integer and soft aperture slot combination 3 between neodymium glass amplifier 2 and gratings compressor 4.Described soft aperture slot is provided with oval light hole.
Fig. 2 is the gratings compressor structural representation in the chirped pulse amplifying laser device of the present utility model, among the figure, the nanosecond chirped pulse through too small grating 11, big grating 12, big grating 13 and little grating 14, is finished pulse compression process output psec or subpicosecond level short pulse successively.Its medium and small grating 11 is parallel with big grating 12, and big grating 13 is parallel with little grating 14, and two groups of parallel gratings are to antiparallel.
Among Fig. 3, Fig. 3 a is for advancing compressor reducer beam cross section 5, and Fig. 3 b is light beam perspective plane 6 on the little grating, and Fig. 3 c is light beam perspective plane 7 on the big grating.
The concrete course of work of the present utility model is as follows:
After the elliptical beam chirped pulse amplifies, can obtain amplifying consistent circular focal beam spot, therefore can not bring harmful effect physical test by the curvature of change focusing paraboloidal mirror along the transverse direction with traditional chirped pulse.
Claims (2)
1. chirped pulse amplifying laser device, comprise grating stretching device (1), neodymium glass amplifier (2) and gratings compressor (4), the three connects successively, it is characterized in that: also comprise being arranged on being used between neodymium glass amplifier (2) and the gratings compressor (4) laser pulse is carried out filtering, the spatial filter that expands bundle, light beam integer and soft aperture slot combination (3).
2. chirped pulse amplifying laser device according to claim 1, it is characterized in that: described soft aperture slot is provided with oval light hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200809327U CN201118090Y (en) | 2007-08-29 | 2007-08-29 | Chirp pulse amplification laser apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200809327U CN201118090Y (en) | 2007-08-29 | 2007-08-29 | Chirp pulse amplification laser apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201118090Y true CN201118090Y (en) | 2008-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200809327U Expired - Fee Related CN201118090Y (en) | 2007-08-29 | 2007-08-29 | Chirp pulse amplification laser apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN201118090Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124607A (en) * | 2014-03-28 | 2014-10-29 | 上海飞涅尔激光科技有限公司 | Device for generating picosecond pulse laser with high average power |
| CN105182545A (en) * | 2015-08-26 | 2015-12-23 | 北京国科世纪激光技术有限公司 | Laser device |
| CN105720474A (en) * | 2014-12-05 | 2016-06-29 | 中国科学院上海光学精密机械研究所 | Subtend compression chirped pulse amplification laser system |
| CN111509547A (en) * | 2020-03-27 | 2020-08-07 | 中国科学院上海光学精密机械研究所 | Ultrahigh peak power femtosecond laser cascade hybrid compression system |
-
2007
- 2007-08-29 CN CNU2007200809327U patent/CN201118090Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124607A (en) * | 2014-03-28 | 2014-10-29 | 上海飞涅尔激光科技有限公司 | Device for generating picosecond pulse laser with high average power |
| CN105720474A (en) * | 2014-12-05 | 2016-06-29 | 中国科学院上海光学精密机械研究所 | Subtend compression chirped pulse amplification laser system |
| CN105720474B (en) * | 2014-12-05 | 2019-06-18 | 中国科学院上海光学精密机械研究所 | Opposite direction compression Chirp pulse amplification laser system |
| CN105182545A (en) * | 2015-08-26 | 2015-12-23 | 北京国科世纪激光技术有限公司 | Laser device |
| CN111509547A (en) * | 2020-03-27 | 2020-08-07 | 中国科学院上海光学精密机械研究所 | Ultrahigh peak power femtosecond laser cascade hybrid compression system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080917 Termination date: 20100829 |