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Proceedings Paper

Improving 355nm laser damage resistance for fluoride mirrors with overcoat layer
Author(s): Zhen Yu; Hongji Qi; Weili Zhang; Hu Wang; Bin Wang
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Paper Abstract

The damage resistance of 355nm laser can be improved for fluoride mirrors with an SiO2 overcoat layer. Three kinds of samples are deposited with the overcoat layer of different thicknesses. Calculated with Stoney equation, the residual stress of the film can be altered to the compressive stress with the increase of the overcoat layer. Through the investigation of the damage pits, we find the damages are the thermal-mechanical coupled and induced by the nodules buried in the fluoride multilayers. The surface morphologies around the damage pits are analyzed from the two respects: Cracks and surface ablation. The two characters of the damage morphologies can be suppressed with the addition of the SiO2 overcoat layer.

Paper Details

Date Published: 1 August 2017
PDF: 8 pages
Proc. SPIE 10339, Pacific Rim Laser Damage 2017: Optical Materials for High-Power Lasers, 103390F (1 August 2017); doi: 10.1117/12.2269713
Show Author Affiliations
Zhen Yu, Shanghai Institute of Optics and Fine Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Hongji Qi, Shanghai Institute of Optics and Fine Mechanics (China)
Weili Zhang, Shanghai Institute of Optics and Fine Mechanics (China)
Hu Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Bin Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Univ. of Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 10339:
Pacific Rim Laser Damage 2017: Optical Materials for High-Power Lasers
Jianda Shao; Takahisa Jitsuno; Wolfgang Rudolph, Editor(s)

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