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Proceedings Paper

Laser-induced damage of fused silica on high-power laser: beam intensity modulation, optics defect, contamination
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Paper Abstract

The wedged focus lens of fused silica, one of the final optics assembly’s optics, focuses the 351 nm beam onto target and separates the residual 1053 and 527 nm light with 351 nm light. After the experiment with beam energies at 3ω range from 3 to 5KJ, and pulse shapes about 3ns, the wedged focus lens has laser-induced damage at particular area. Analysis the damage result, there are three reasons to induce these damages. These reasons are beam intensity modulation, optics defect and contamination that cause different damage morphologies. The 3ω beam intensity modulation, one of three factors, is the mostly import factor to induce damage. Here, the n2 nonlinear coefficient of fused silica material can lead to small-scale self-focusing filament because of optics thickness and beam intensity. And some damage-filaments’ tails are bulk damage spots because there are subsurface scratches or metal contaminations.

Paper Details

Date Published: 23 November 2015
PDF: 9 pages
Proc. SPIE 9632, Laser-Induced Damage in Optical Materials: 2015, 96320G (23 November 2015); doi: 10.1117/12.2192426
Show Author Affiliations
Dongfeng Zhao, Shanghai Institute of Optics and Fine Mechanics (China)
Mingyin Sun, Shanghai Institute of Optics and Fine Mechanics (China)
Rong Wu, Shanghai Institute of Optics and Fine Mechanics (China)
Xinqiang Lu, Shanghai Institute of Optics and Fine Mechanics (China)
Zunqi Lin, Shanghai Institute of Optics and Fine Mechanics (China)
Jianqiang Zhu, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 9632:
Laser-Induced Damage in Optical Materials: 2015
Gregory J. Exarhos; Vitaly E. Gruzdev; Joseph A. Menapace; Detlev Ristau; MJ Soileau, Editor(s)

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