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

Paper Details

Date Published: 13 March 2019
PDF: 9 pages
Proc. SPIE 10898, High Power Lasers for Fusion Research V, 1089807 (13 March 2019); doi: 10.1117/12.2509689
Show Author Affiliations
Jianqiang Zhu, Shanghai Institute of Optics and Fine Mechanics (China)
Mingying Sun, Shanghai Institute of Optics and Fine Mechanics (China)
Zhaoyang Jiao, Shanghai Institute of Optics and Fine Mechanics (China)
Yajing Guo, Shanghai Institute of Optics and Fine Mechanics (China)
Chong Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Xingchen Pan, Shanghai Institute of Optics and Fine Mechanics (China)
Hua Tao, Shanghai Institute of Optics and Fine Mechanics (China)
Cheng Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Xuejie Zhang, Shanghai Institute of Optics and Fine Mechanics (China)
Xue Dong, Shanghai Institute of Optics and Fine Mechanics (China)
Bei Cheng, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 10898:
High Power Lasers for Fusion Research V
Abdul A. S. Awwal; Constantin L. Haefner, Editor(s)

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