中国光学（中英文）2024，Vol.17Issue(2)：366-373,8.DOI:10.37188/CO.2023-0142
应用于高能激光器的XY离焦像差校正方法
An XY defocus aberration correction method for high-energy lasers
摘要
Abstract
A method for correcting XY defocus aberrations,based on Hartmann-Shack wavefront sensor and two-dimensional beam-shaping light path,was presented due to the large percentage of defocus and 0°astig-matism aberrations with large PV values in high-energy laser beam.The first step is to derive an expression for XY defocus aberrations by linearly combining the defocus and 0° astigmatism terms of Zernike polynomi-als.The coefficients directly characterize the wavefront peak-to-valley(PV)values of X and Y defocus.At the same time,compensation for XY defocus wavefronts of the laser beam can be achieved by fine-tuning the mirror spacing in the two-dimensional shaping optics of the high-energy laser.Therefore,the Hartmann wavefront sensor is used to extract the coefficients of XY defocus aberrations from the laser beam.The com-puter dynamically adjusts the mirror spacing in the two-dimensional shaping optics based on these coeffi-cient values to correct XY defocus aberrations and improve the beam quality of the output laser beam.The results of the experiment showcase a significant decrease in PV value of XY defocus aberrations from 5.2 μm and 1.1 μm to less than 0.5 μm,as well as a decrease in β factor from 3.1 to 1.8,resulting in substantial im-provement in beam quality.关键词
高能激光/光束质量/像差校正/光束整形/矩阵光学Key words
high energy laser/beam quality/aberration correction/beam shaping/matrix optics分类
信息技术与安全科学引用本文复制引用
冯亚飞,韦承甫,任晓明,郭建增,王杰..应用于高能激光器的XY离焦像差校正方法[J].中国光学（中英文）,2024,17(2):366-373,8.基金项目
国家高技术发展计划(No.51326010201)Supported by National High-tech R&D Program(No.51326010201) （No.51326010201）
