A Debugging Method for Parallel Grating Surface of Compressor in Ultrashort Pulse Laser System

Abstract

The invention relates to a parallel debugging method for a compressor grating surface of an ultra-short pulse laser system, which belongs to the technical field of grating adjustment. The compressor grating is adjusted by using the space-spectrum interference information of the upper sub-aperture and the lower sub-aperture of the reference light and the output light of the compressor. The planes in the vertical direction are parallel, and the space-spectrum interference information of the left sub-aperture and the right sub-aperture of the output light of the compressor is used to adjust the plane parallelism of the compressor grating in the horizontal direction. The invention has an intuitive principle and simple operation. , High precision, can realize parallel fine adjustment of the compressor grating in the vertical direction and horizontal direction at the same time, without affecting the main laser light path, and can be realized online.

Description

technical field [0001] The invention belongs to the technical field of grating adjustment, and in particular relates to a parallel debugging method for a compressor of an ultrashort pulse laser system. Background technique [0002] Ultrashort ultraintense pulse laser is an important tool for studying the interaction between laser and matter. Chirped pulse amplification is the most commonly used method to generate ultra-short and ultra-intense pulse laser. The limit output pulse is obtained by stretching-amplifying-compressing the pulsed laser source. In a chirped pulse amplification system, the compressor is a key component and generally consists of a pair of parallel gratings. When the surface of the compressor grating is parallel to the reticle, and the introduced negative dispersion compensates the positive dispersion introduced by the pulsed laser source during the stretching and amplifying process, the system can obtain the limit output pulse. [0003] The adjustment ...

AI Technical Summary

Problems solved by technology

During the debugging process, the positions of the collimated light source and the right-angle prism need to be changed, the operation is cumbersome, and the optical path needs to be rebuilt every time debugging

Xia Suqiu and others proposed to use the autocorrelator and the far-field detector composed of Fabry-Perot interferometer, dispersive mirror and CCD to monitor and adjust the angular misalignment of the grating on-line (see On-line monitoring of optical pulse compressor grating misalignment and Adjustment method, China Laser, 2016, 43(8)), this method requires many professional instruments, and the structure of the monitoring optical path and adjustment ideas are complicated. It is suitable for professionals who are familiar with the principle and structure of the entire system

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