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Proceedings Paper

Research on laser damage of final optics assembly on high-power laser facility
Author(s): Dongfeng Zhao; Rong Wu; Zunqi Lin; Jianqiang Zhu; Li Wang
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Paper Abstract

In order to improve laser damage resistance of the Final Optics Assembly (FOA), simulation analysis have been done for 1ω, 2ω and 3ω laser beam considering ghost images to the 4th order. The panels of ground glass scatter ghost laser around the FOA walls and the panels of architectural glass absorb the 1th order energy. The appearance of smoothing fused silica surface defect and the effect of wiping off etching contamination are researched on HF-based etching processes under ultrasonic. Now, 18 shots were executed using 310x310mm laser with 3ns pulse width. During the experiment, the third harmonic laser terminal output energy is 1500J~3500J, and the maximum laser energy flux is about 4J/cm2. This presentation addresses the optical configuration of the FOA, the simulation analysis of ghost, the way of ground glasses absorbing energy and the result of laser damage resistance of fused silica on HF-based etching processes under ultrasonic.

Paper Details

Date Published: 31 October 2014
PDF: 7 pages
Proc. SPIE 9237, Laser-Induced Damage in Optical Materials: 2014, 92371V (31 October 2014); doi: 10.1117/12.2066260
Show Author Affiliations
Dongfeng Zhao, Shanghai Institute of Optics and Fine Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Rong Wu, 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)
Li Wang, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 9237:
Laser-Induced Damage in Optical Materials: 2014
Gregory J. Exarhos; Vitaly E. Gruzdev; Joseph A. Menapace; Detlev Ristau; MJ Soileau; Detlev Ristau, Editor(s)

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