CN107132634B - The reloading method of grating in a kind of large size ultra-short pulse laser compressor - Google Patents
The reloading method of grating in a kind of large size ultra-short pulse laser compressor Download PDFInfo
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- CN107132634B CN107132634B CN201710508593.6A CN201710508593A CN107132634B CN 107132634 B CN107132634 B CN 107132634B CN 201710508593 A CN201710508593 A CN 201710508593A CN 107132634 B CN107132634 B CN 107132634B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0057—Temporal shaping, e.g. pulse compression, frequency chirping
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
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- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of reloading methods of grating in large-scale ultra-short pulse laser compressor, the following steps are included: plane where each grating in label laser compressor, center and eye point position, reference for installation as refitting grating, debug pitch angle and the groove direction of each refitting grating, each refitting grating is guided to be installed in place according to reference for installation, the present invention utilizes the first level, the re-installation effort of second level completion grating, traditional optical path integrated approach is overturned, it is convenient to operate, significantly improve working efficiency and refitting precision, simultaneously, first level, the optical maser wavelength of second level is located within prime signal optical source wave-length coverage, it being capable of substitution signal light source, in addition, first level, second level is the common device in laboratory, it is easy to get.
Description
Technical field
The present invention relates to laser equipment technical fields, in particular to light in a kind of large-scale ultra-short pulse laser compressor
The reloading method of grid.
Background technique
PW grades of OPCPA (optical parameter chirped pulse amplification) technology platforms of number are that the current world is maximum complete what is built
OPCPA technology laser aid, the symmetrically placed completion pulse compression of the grating that its compressor is parallel to each other by two groups, it can be defeated
Energy reaches hundred joules out, and pulse width is compressed to 20fs magnitude, to reach this target, need to use four blocks of meter level gratings.With
The progress of laser the relevant technologies and the continuous promotion of peak power, core devices-grating bore of laser compressor is not yet
Disconnected to expand, since replacement grating causes laser compressor to need to debug again, debugging process is cumbersome, and working efficiency is low.
Summary of the invention
The debugging again of laser compressor is divided into two parts of refitting and accurate adjustment, each grating face posture and each after the completion of debugging
Relative position between grating determines the working condition of laser compressor, and therefore, inventor marks original each before refitting
Debugging process has been simplified as the reference for installation of refitting grating in plane, center and eye point position where grating, improves
Working efficiency.In addition, being needed since the operating central wavelength of laser compressor is 800nm using traditional grating refitting scheme
It will be by prime signal optical source, it is therefore desirable to which the wave-length coverage of prime signal optical source is 750-850nm, and the wave-length coverage
Interior wave band is predominantly located in the invisible range of living human eye, installation accuracy depend on operator previous experience and
Eyesight causes installation accuracy to vary with each individual, and angular error is based on this, inventors herein proposes one between 3mrad-18mrad
Kind in no optical reference and in the case where there is no prime signal optical source, the refitting of grating can simple, quickly, be accurately realized
Method.
The present invention provides a kind of reloading methods of grating in large-scale ultra-short pulse laser compressor.
To achieve the above object, the invention provides the following technical scheme:
The reloading method of grating in a kind of large size ultra-short pulse laser compressor, comprising the following steps:
S1: plane, center and eye point position where each grating in label laser compressor, as refitting grating
Reference for installation；
S2: the pitch angle of each refitting grating of debugging and groove direction；
S3: each refitting grating is guided to be installed in place according to reference for installation.
Further, the laser compressor intracavity bottom is equipped with optical backplane, and each grating is located on optical backplane,
The both ends of the laser compressor are respectively equipped with entrance aperture and perforation hole, and the first level is set at entrance aperture, and described first throws
The center of line instrument face entrance aperture.
Further, in the step S1, the labeling method of plane where each grating are as follows:
The second level is set in grating side, scans out the first vertical laser plane along grating face using the second level,
The intersection for marking the first vertical laser plane and laser compressor inner wall is moved as the reference trajectory of plane where grating
Dynamic second level is to next grating side, the reference trajectory of plane where successively label completes each grating.
Further, in the step S1, the labeling method of each raster center position are as follows:
First level or the second level are placed at the grating face of grating, the first level or the second level are utilized
Scan out the second vertical laser plane along horizontal direction, and the second vertical laser plane it is inswept be located at the grating it is same
Each grating geometric center on horizontal line, the friendship of the reference trajectory of plane where marking the second vertical laser plane and grating
Point, the intersection point are the center of grating, and mobile first level or the second level are until complete each raster center position
The label set.
Further, in the step S1, the labeling method of eye point position are as follows:
The third vertical laser plane by entrance aperture and each raster center position is scanned out using the first level, marks institute
State Exit positions of the third vertical laser plane at perforation hole, as eye point position.
Further, in the step S2, the second level is placed in the front of refitting grating, is swept using the second level
Horizontal laser plane out, the horizontal laser light plane form reflecting surface after resetting optical grating diffraction, the horizontal laser light plane, anti-
Penetrating face, projection forms incident ray, reflected ray respectively on laser compressor inner wall.
Further, the grating face of the refitting grating is rotated, promotes reflected ray parallel with incident ray, that is, complete to carve
The adjustment of line direction.
Further, pitch angle adjustment is carried out to the refitting grating, reflected ray is promoted to be overlapped with incident ray, that is, complete to bow
The adjustment of elevation angle degree.
Further, in the step S3, first is scanned out along the reference trajectory of plane where grating using the second level
Vertical laser plane utilizes inswept the second vertical laser plane by raster center position of the first level, guidance refitting light
Grid are installed in place, and are sequentially completed the installment work of each refitting grating.
It further, further include being scanned out using the first level by entrance aperture and each raster center after the step S3
4th vertical laser plane of position, check Exit positions of the 4th vertical laser plane at perforation hole whether with outgoing point
Coincidence is set, if being overlapped, completes the re-installation effort of grating, conversely, then repeating step S2-S3 until being overlapped.
The beneficial effects of the present invention are:
The re-installation effort that grating is completed using the first level, the second level, has overturned traditional optical path integrated approach,
It is convenient to operate, and significantly improves working efficiency and refitting precision, meanwhile, the optical maser wavelength position of the first level, the second level
Within prime signal optical source wave-length coverage, can substitution signal light source, in addition, the first level, the second level be experiment
The common device of room, is easy to get.
Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 is the internal structure top view of laser compressor in the embodiment of the present invention one；
Fig. 3 is plane where single grating and center label schematic diagram；
Fig. 4 is plane where each grating, center and eye point label schematic diagram；
Fig. 5 is grating line direction adjustment schematic diagram；
Fig. 6 is grating pitch angle adjustment front view.
In attached drawing: 1- laser compressor, 2- optical backplane, 3- entrance aperture, 4- perforation hole, the first grating of 5-, the second light of 6-
Grid, 7- third grating, the 4th grating of 8-, the first level of 9-, the second level of 10-, 11- incident ray, 12- incident ray, 13-
Horizontal laser light plane, 14- reflecting surface, 15- reflected ray, the first vertical laser of 16- plane, the second vertical laser of 17- plane, 18-
Reference trajectory, the 21- of plane where the reference trajectory of plane, the first center 19-, the second grating of 20- where first grating
It is flat where the reference trajectory of plane, 23- third center, the 4th grating of 24- where second center, 22- third grating
Reference trajectory, the 4th center 25-, the 26- in face reset grating.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment one:
As shown in Figs. 1-2, in a kind of large-scale ultra-short pulse laser compressor grating reloading method, the laser compressor
1 intracavity bottom is equipped with optical backplane 2, and the optical backplane 2 is equipped with the first grating 5, the second grating 6, third grating 7, the
The both ends of four gratings 8, the laser compressor 1 are respectively equipped with entrance aperture 3 and perforation hole 4, wherein 5 face of the first grating is incident
Hole 3 is arranged, and 6 face perforation hole 4 of the second grating setting, the first grating 5 is arranged in parallel with third grating 7, the second grating 6 and the 4th
Grating 8 is arranged in parallel, and first level 9 at 3 center of face entrance aperture is set at entrance aperture 3, and incident ray 11 enters through entrance aperture 3
It is incident upon inside laser compressor 1.
The reloading method of grating, is removed existing first on optical backplane 2 in a kind of large size ultra-short pulse laser compressor
4 refitting grating correspondences are installed on the first grating 5, the second grating by grating 5, the second grating 6, third grating 7, the 4th grating 8
6, third grating 7,8 position of the 4th grating, specifically includes the following steps:
Firstly, plane, center and eye point position where 4 existing gratings in label laser compressor 1, as weight
Fill the reference for installation of grating.
Wherein, the labeling method of plane where each grating are as follows:
As shown in figure 3, setting the second level 10 in 5 side of the first grating, swept using the second level 10 along grating face
First vertical laser plane 16 out marks the intersection of the first vertical laser plane 16 and 1 inner wall of laser compressor, as the
The reference trajectory 18 of plane where one grating, successively moves 10 to the second grating 6 of the second level, third grating 7, the 4th grating
8 side, the reference trajectory of plane where successively label completes each grating, as shown in figure 4, the benchmark of plane where the second grating
Track 20, the reference trajectory 22 of plane where third grating, the reference trajectory 24 of plane where the 4th grating.
Wherein, the labeling method of each raster center position are as follows:
As shown in figure 3, the first level 9 is placed at the grating face of the first grating 5, using the first level 9 along dampening
Square to scanning out the second vertical laser plane 17, and the second vertical laser plane 17 is inswept is located at first grating 5
Each grating geometric center in same horizontal line, i.e. the second vertical laser plane 17 while inswept first grating 5, the second grating 6
Geometric center, mark the intersection point of the reference trajectory 18 of the second vertical laser plane 17 and the first grating place plane, institute
The center that intersection point is the first grating 5, i.e. the first center 19 are stated, mobile first level 9 is until complete each grating
The label of center, as shown in figure 4, the center of the second grating 6 i.e. the second center 21, the center of third grating 7
Position, that is, third center 23, the center of the 4th grating 8 i.e. the 4th center 25, meanwhile, above-mentioned center is
Reset the center of grating.Further, since the marked completion of plane where each grating, therefore, in some other embodiment,
The marking operation of each raster center position can also be completed using the second level 10.
Wherein, the labeling method of eye point position are as follows:
The third vertical laser plane by entrance aperture 3 and each raster center position is scanned out using the first level 9, is marked
Exit positions of the third vertical laser plane at perforation hole 4, as eye point position.
Secondly, the second level 10 to be placed in the front of refitting grating, pitch angle and the quarter of each refitting grating are debugged
Line direction scans out horizontal laser light plane 13 using the second level 10, the horizontal laser light plane 13 is through weight as described in Fig. 5-6
Formation reflecting surface 14 after dress 26 diffraction of grating, the grating face normal of dotted line expression refitting grating 26, the horizontal laser light plane 13,
Projection forms incident ray 12, reflected ray 15 to reflecting surface 14 respectively on 1 inner wall of laser compressor, to the light of the refitting grating 26
Grid face is rotated, and promotes reflected ray 15 parallel with incident ray 12, i.e., completion groove direction adjustment, to the refitting grating 26 into
The adjustment of row pitch angle, promotes reflected ray 15 to be overlapped with incident ray 12, i.e. the adjustment of completion pitch angle, at this point, refitting grating 26
With horizontal plane, it is sequentially adjusted in groove direction, the pitch angle of other 3 refitting gratings.
Then, each refitting grating is guided to be installed in place according to reference for installation shown in Fig. 4, as shown in figure 3, throwing using second
Line instrument 10 scans out the first vertical laser plane 16 along the reference trajectory 18 of plane where the first grating, utilizes the first level 9
Inswept the second vertical laser plane 17 by the first center 19, i.e., again using the first level 9 and the second level 10
The reference trajectory 18 of plane, the first center 19 where existing first grating, guidance refitting grating are installed in place 5 institute of the first grating
In position, it is sequentially completed the installment work of each refitting grating.
Finally, being scanned out using the first level 9 flat by the 4th vertical laser of entrance aperture 3 and each raster center position
Face, checks whether Exit positions of the 4th vertical laser plane at perforation hole 4 are overlapped with eye point position, if being overlapped, completes
The re-installation effort of grating, conversely, then repeating step S2-S3 until being overlapped.
In some other embodiment, 4 pieces or more of grating is equipped in 1 inner cavity of laser compressor, it equally can be by
Grating refitting is completed according to reloading method of the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (2)
1. the reloading method of grating in a kind of large size ultra-short pulse laser compressor, which comprises the following steps:
S1: plane, center and eye point position where each grating in label laser compressor, the installation as refitting grating
Benchmark；
The laser compressor intracavity bottom is equipped with optical backplane, and each grating is located on optical backplane, the laser pressure
The both ends of contracting device are respectively equipped with entrance aperture and perforation hole, and the first level is set at entrance aperture, and the first level face enters
The center of perforation；
The labeling method of plane where each grating are as follows: the second level is set in grating side, using the second level along grating
Face scans out the first vertical laser plane, the intersection of the first vertical laser plane and laser compressor inner wall is marked, as light
The reference trajectory of plane where grid, mobile second level to next grating side, successively it is flat to complete each grating place for label
The reference trajectory in face；
The labeling method of each raster center position are as follows: the first level or the second level are placed at the grating face of grating, benefit
The second vertical laser plane is scanned out along horizontal direction with the first level or the second level, and second vertical laser is flat
Face is inswept to be located at each grating geometric center in same horizontal line with the grating, marks the second vertical laser plane and light
The intersection point of the reference trajectory of plane where grid, the intersection point is the center of grating, mobile first level or the second throwing
Line instrument is until complete the label of each raster center position；
The labeling method of eye point position are as follows: scan out the third by entrance aperture and each raster center position using the first level
Vertical laser plane marks Exit positions of the third vertical laser plane at perforation hole, as eye point position；
S2: the pitch angle of each refitting grating of debugging and groove direction；
Second level is placed in the front of refitting grating, scans out horizontal laser light plane, the level using the second level
Laser plane forms reflecting surface after resetting optical grating diffraction, and the horizontal laser light plane, reflecting surface are on laser compressor inner wall
Projection forms incident ray, reflected ray respectively, rotates to the grating face of the refitting grating, promotes reflected ray and incident ray flat
Row, the i.e. adjustment of completion groove direction, carry out pitch angle adjustment to the refitting grating, reflected ray are promoted to be overlapped with incident ray,
Complete pitch angle adjustment；
S3: the first vertical laser plane is scanned out along the reference trajectory of plane where grating using the second level, utilizes first
Level is inswept by raster center position the second vertical laser plane, guidance refitting grating is installed in place, is sequentially completed each
Reset the installment work of grating.
2. the reloading method of grating, feature exist in a kind of large-scale ultra-short pulse laser compressor according to claim 1
In the step S3 further includes being scanned out using the first level and being hung down by the 4th of entrance aperture and each raster center position later
Straight laser plane, checks whether Exit positions of the 4th vertical laser plane at perforation hole are overlapped with eye point position, if weight
It closes, completes the re-installation effort of grating, conversely, then repeating step S2-S3 until being overlapped.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710508593.6A CN107132634B (en) | 2017-06-28 | 2017-06-28 | The reloading method of grating in a kind of large size ultra-short pulse laser compressor |
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| CN201710508593.6A CN107132634B (en) | 2017-06-28 | 2017-06-28 | The reloading method of grating in a kind of large size ultra-short pulse laser compressor |
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| CN107132634B true CN107132634B (en) | 2019-04-16 |
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| CN109541773A (en) * | 2018-12-27 | 2019-03-29 | 天津国阳科技发展有限公司 | Adjust the grating line method parallel with linear light source |
| CN111211474B (en) * | 2020-01-15 | 2021-05-04 | 中国科学院上海光学精密机械研究所 | Full-width adjusting method of grating compressor based on self-leveling laser line projector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8068522B2 (en) * | 2004-06-24 | 2011-11-29 | Lawrence Livermore National Security, Llc | Hyper dispersion pulse compressor for chirped pulse amplification systems |
| US7263260B2 (en) * | 2005-03-14 | 2007-08-28 | Matsushita Electric Industrial Co., Ltd. | Low cost, high precision multi-point optical component attachment |
| CN1713061A (en) * | 2005-03-31 | 2005-12-28 | 中国工程物理研究院激光聚变研究中心 | Grating regulating method for compressor in chirp pulse amplification system |
| CN1909305A (en) * | 2006-07-14 | 2007-02-07 | 中国科学院上海光学精密机械研究所 | High-power large-energy ultrashort laser pulse widening device and adjusting method thereof |
| CN100526964C (en) * | 2006-07-28 | 2009-08-12 | 中国科学院上海光学精密机械研究所 | Method for adjusting parallelism of multiple pairs of gratings |
| US8369017B2 (en) * | 2008-10-27 | 2013-02-05 | Ondax, Inc. | Optical pulse shaping method and apparatus |
| CN201576129U (en) * | 2009-11-13 | 2010-09-08 | 北京交通大学 | Device with spring for adjusting FBG (fiber bragg grating) |
| CN105071209A (en) * | 2015-07-21 | 2015-11-18 | 中国工程物理研究院激光聚变研究中心 | Method for debugging compressor of ultra-short pulse laser system |
| CN106848808B (en) * | 2016-10-25 | 2018-12-28 | 中国工程物理研究院激光聚变研究中心 | A kind of method of adjustment and adjustment device of elimination sub-gratings density contrast |
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