Primary installing method of optical grating in large-size ultra-short pulse laser compressor
A technology of ultra-short pulse laser and compressor, which is applied in the direction of lasers, laser parts, phonon exciters, etc., which can solve the problems of unfavorable personnel operation, high initial installation accuracy, and limited internal space, so as to improve work efficiency and improve The effect of initial installation accuracy and convenient operation
Active Publication Date: 2017-09-01
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Problems solved by technology
[0003] At present, there are many difficulties in the installation and debugging of the grating in the compressor: 1. There is no benchmark for the installation of the grating; 2. The compressor of several PW-level OPCPA platforms has a large scale and limited internal space, which is not conducive to personnel operation, and the translation and rotation of the large grating frame The amount is limited (the translation amount is 2.5cm, and the rotation amount is 2°), which requires high precision in the initial installation; 3. The installation process lacks a standard 800nm light source
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Embodiment 1
[0036] Such as Figure 1-2 As shown, a method for initial installation of a grating in a large-scale ultrashort pulse laser compressor, the two ends of the laser compressor 1 are respectively provided with an entrance hole 3 and an exit hole 4, and a first line projector is set at the entrance hole 3 9. The first line thrower 9 is facing the center of the entrance hole 3, and the vertical height of the first line thrower 9 is higher than the height of the grating. In this embodiment, according to the design drawing, the inner cavity of the laser compressor 1 There are 4 gratings, respectively grating 5, grating 6, grating 7, and grating 8, wherein grating 5 is set facing the entrance hole 3, grating 6 is set facing the exit hole 4, grating 5 and grating 7 are set in parallel, grating 6 Set parallel to the grating 8.
[0037] The initial installation method of grating in the described large-scale ultrashort pulse laser compressor comprises the following steps:
[0038] First,...
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The invention relates to a primary installing method of an optical grating in a large-size ultra-short pulse laser compressor, and belongs to the technical field of laser equipment. An optical bottom plate is arranged in an inner cavity of the laser compressor; the installing coordinates of the optical grating are drawn on the optical bottom plate; the optical grating is installed according to the installing coordinates; the line scribing direction and the pitching angle of the optical grating are gradually regulated; whether the line scribing directions and the pitching angles of all optical gratings are identical or not is verified. The method has the advantages that the primary installing work of the optical grating is performed on the premise without optical reference and a front-level signal light source; a traditional optical path integrating method is overturned; the operation is simple and convenient; the work efficiency and the primary installing precision are obviously improved.
Description
technical field [0001] The invention relates to the technical field of laser equipment, in particular to a method for initial installation of a grating in a large ultrashort pulse laser compressor. Background technique [0002] The compressor is an essential part of the ultrashort pulse laser system, responsible for the temporal compression of the amplified laser pulse. With the advancement of laser-related technology and the continuous increase of peak power, the core device of the compressor - the aperture of the grating is constantly expanding. Several PW-level OPCPA (Optical Parametric Chirped Pulse Amplification) technology platform is currently the largest full-OPCPA technology laser device under construction in the world. Its compressor is composed of two sets of parallel gratings symmetrically placed to complete the pulse compression. It can output energy up to Hundreds of joules, the pulse width is compressed to the order of 20fs. To achieve this goal, four meter-l...
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CPCH01S3/0057
Inventor 周凯南郭仪孙立曾小明王晓东左言磊
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS