Laser damage on large aperture triple frequency crystal optics in high power laser system

Xiuqing Jiang; Lailin Ji; Mingying Sun; Chong Liu; Yajing Guo; Shunxing Tang; Dong Liu; Boaqing Zhu; Jianqiang Zhu

doi:10.1117/12.2540116

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8 July 2019 Laser damage on large aperture triple frequency crystal optics in high power laser system

Xiuqing Jiang, Lailin Ji, Mingying Sun, Chong Liu, Yajing Guo, Shunxing Tang, Dong Liu, Boaqing Zhu, Jianqiang Zhu

Author Affiliations +

Proceedings Volume 11063, Pacific Rim Laser Damage 2019: Optical Materials for High-Power Lasers; 110630Q (2019) https://doi.org/10.1117/12.2540116
Event: Pacific Rim Laser Damage 2019 and Thin Film Physics and Applications 2019, 2019, Qingdao, China

Abstract

In high power laser system, the 3ω laser fluence can up to 6J/cm² with triple frequency conversion efficiency up to 75%. Two high fluence laser experiments have been done for proving high efficiency output and damage resistance of KDP crystal. The KDP crystals have different performance in these two experiments due to their characteristics nuances. For the third harmonic crystal in first experiments, centimeter damage occurred on this crystal after about 50 number laser shots, and more than ten thousands micrometer damage points occurred on this crystal. For the second KDP crystal after about 60 number laser shots, most damage size are micrometer, including bulk damage and damage on back surface, micrometer damage doesn’t exist because of its good quality. We classify these damages of crystals to different kinds, observe characteristics of these damages. Observation of laser damage on third-harmonic converter crystals have been done in this paper.

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Xiuqing Jiang, Lailin Ji, Mingying Sun, Chong Liu, Yajing Guo, Shunxing Tang, Dong Liu, Boaqing Zhu, and Jianqiang Zhu "Laser damage on large aperture triple frequency crystal optics in high power laser system", Proc. SPIE 11063, Pacific Rim Laser Damage 2019: Optical Materials for High-Power Lasers, 110630Q (8 July 2019); https://doi.org/10.1117/12.2540116

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