Key issues of damage resistance of final optics for ICF high power laser facility

Jianqiang Zhu; Mingying Sun; Zhaoyang Jiao; Yajing Guo; Chong Liu; Xingchen Pan; Hua Tao; Cheng Liu; Xuejie Zhang; Xue Dong; Bei Cheng

doi:10.1117/12.2509689

13 March 2019 Key issues of damage resistance of final optics for ICF high power laser facility

Jianqiang Zhu, Mingying Sun, Zhaoyang Jiao, Yajing Guo, Chong Liu, Xingchen Pan, Hua Tao, Cheng Liu, Xuejie Zhang, Xue Dong, Bei Cheng

Author Affiliations +

Proceedings Volume 10898, High Power Lasers for Fusion Research V; 1089807 (2019) https://doi.org/10.1117/12.2509689
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

3ω laser damage of fused silica optics is the bottleneck of high power laser systems for ICF. Excellent beam quality plays an important role in improving the anti-damage capability of final optics system. We have developed a new optical field measurement technology based on computational optical imaging. With the high power laser prototype of SGII-UP facility, damage resistance of final optics was experimentally studied. The near filed of laser beam was measured with a high resolution to study the effects of modulation and propagation on laser damage. The near field improvement of high power laser beam are reported and the influence of near filed quality on damage performance of final optics are discussed. The development of the defect detection techniques of final optics are introduced. Finally, we present the development perspective of final optics system for ICF laser driver. At present, the damage resistance capability of final optics assembly is 6J/cm² at normal operation, we will continue to improve the ability in the next step of work.

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Citation Download Citation

Jianqiang Zhu, Mingying Sun, Zhaoyang Jiao, Yajing Guo, Chong Liu, Xingchen Pan, Hua Tao, Cheng Liu, Xuejie Zhang, Xue Dong, and Bei Cheng "Key issues of damage resistance of final optics for ICF high power laser facility", Proc. SPIE 10898, High Power Lasers for Fusion Research V, 1089807 (13 March 2019); https://doi.org/10.1117/12.2509689

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