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Method for monitoring and adjusting compressor of jointing grating matched between wavelength and angle

A grating compressor and adjustment method technology, applied in optics, instruments, optical components, etc., can solve the problems of spliced ​​grating adjustment, difficult real-time monitoring, and lack of consideration of sub-grating line density differences, etc.

Inactive Publication Date: 2007-05-09
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

An article titled "Discussion on Multi-grating Stitching Coherent Superposition for High Energy Chirped Pulse Amplified Laser" (Optics Letter, T.J.Kessler, J.Bunkenburg, H.Huang, A.Kozlov and D.D.Meyerhofer, 29, 635, 2004 ) proposed a method of grating splicing and real-time monitoring using Fizeau interferometer and far-field method, but in this method, the situation when there is a difference in line density between the sub-gratings is not considered, and the splicing cannot be spliced ​​with monitoring light. The grating is fully adjusted, that is, the main laser can be focused to the state of the complete focal spot, and it is not easy to monitor in real time

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  • Method for monitoring and adjusting compressor of jointing grating matched between wavelength and angle
  • Method for monitoring and adjusting compressor of jointing grating matched between wavelength and angle
  • Method for monitoring and adjusting compressor of jointing grating matched between wavelength and angle

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Embodiment Construction

[0028] The invention can precisely adjust the spliced ​​grating and realize real-time monitoring by establishing a set of monitoring and adjustment system, and selecting the wavelength of the monitoring light and its incident angle on the spliced ​​grating.

[0029] The schematic diagram of the optical path structure of the monitoring and adjusting device of the embodiment of the present invention is shown in Figure 1. The grating 1 and the grating 2 are a pair of parallel grating pairs, forming a single-pass optical pulse compressor, wherein the grating 2 is spliced ​​by two sub-gratings (3, 4) The main laser is compressed by the grating (1, 2) and then focused by the lens 5, and its far-field distribution is imaged and enlarged by the microscope objective lens 6 and then collected by the CCD camera 7.

[0030] In this embodiment, the linear density of the grating is 1700 lines / mm, the main laser wavelength is 1053 nm, and the incident angle and diffraction angle are 67.0 degr...

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Abstract

A method for monitoring and regulating a grating compressor being split-jointed by wavelength and angle in matching mode includes making split-joint error fast field influence on master laser light and monitor light be consistency by selecting wavelength of monitor light and its incoming angle onto split-jointed grating properly for enabling to regulate said grating to be on better state with simple means and enabling said grating to obtain focal spot near to extreme of diffraction.

Description

technical field [0001] The invention belongs to the field of ultrashort pulse lasers, and in particular relates to a monitoring and adjustment method for a splicing grating compressor with wavelength and angle matching. Background technique [0002] The application of chirped pulse amplification (CPA) has promoted the continuous development of high-energy short-pulse laser technology. At present, the output capability of the CPA laser system is mainly limited by the size of the compressed grating and its damage threshold. Due to the limited aperture of the grating currently available , Mosaic grating technology is a direction for people to solve the problem of large-aperture gratings. An article titled "Discussion on Multi-grating Stitching Coherent Superposition for High Energy Chirped Pulse Amplified Laser" (Optics Letter, T.J.Kessler, J.Bunkenburg, H.Huang, A.Kozlov and D.D.Meyerhofer, 29, 635, 2004 ) proposed a method of grating splicing and real-time monitoring using F...

Claims

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Application Information

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IPC IPC(8): G02B27/00G02B21/32
Inventor 王逍朱启华左言磊林东晖王方蒋东镔黄征任瑞魏晓峰
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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