Laser damage and damage performance caused by near-field of final optics assembles for high power laser system

Yajing Guo; Mingying Sun; Zhaoyang Jiao; Chong Liu; Xiuqing Jiang; Baoqiang Zhu; Jianqiang Zhu

doi:10.1117/12.2540080

8 July 2019 Laser damage and damage performance caused by near-field of final optics assembles for high power laser system

Yajing Guo, Mingying Sun, Zhaoyang Jiao, Chong Liu, Xiuqing Jiang, Baoqiang Zhu, Jianqiang Zhu

Author Affiliations +

Proceedings Volume 11063, Pacific Rim Laser Damage 2019: Optical Materials for High-Power Lasers; 110630P (2019) https://doi.org/10.1117/12.2540080
Event: Pacific Rim Laser Damage 2019 and Thin Film Physics and Applications 2019, 2019, Qingdao, China

Abstract

Laser-induced damage is still the key issue to restrict the development of high power laser system for inertial confinement fusion (ICF). Based on a high power laser prototype, laser-induced damage behaviors and performance of large aperture final optics were experimentally studied. And, the damage inducement and morphology were comprehensively analyzed. Probability density functions (PDF) for laser fluence of near field with different resolution were obtained to analyze the influence of optical field distribution on the optical damage. High fluence of the near field was revealed in PDF with higher resolution, and the missing strong modulation fractions in the measured near field was most probably damage the optical elements. The surface damage morphology was observed and the main damage mechanism was discussed. Several kinds of surface damage morphologies with individual characteristics were sorted. The ratio of width and depth and the main contributors of laser damage were discussed.

Citation Download Citation

Yajing Guo, Mingying Sun, Zhaoyang Jiao, Chong Liu, Xiuqing Jiang, Baoqiang Zhu, and Jianqiang Zhu "Laser damage and damage performance caused by near-field of final optics assembles for high power laser system", Proc. SPIE 11063, Pacific Rim Laser Damage 2019: Optical Materials for High-Power Lasers, 110630P (8 July 2019); https://doi.org/10.1117/12.2540080

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