Impact of organic contamination on laser-induced damage threshold of high reflectance coatings in vacuum

被引：23
|
作者：
Cui, Yun [1 ]
Zhao, Yuanan [1 ]
Yu, Hua [1 ]
He, Hongbo [1 ]
Shao, Jianda [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2008年 / 254卷 / 18期
关键词：
optical coatings; laser-induced damage threshold; organic contamination; vacuum; atmosphere; protective gas;
D O I：
10.1016/j.apsusc.2008.03.185
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The influence of organic contamination in vacuum on the laser-induced damage threshold (LIDT) of coatings is studied. TiO(2)/SiO(2) dielectric mirrors with high reflection at 1064 nm are deposited by the electron beam evaporation method. The LIDTs of mirrors are measured in vacuum and atmosphere, respectively. It is found that the contamination in vacuum is easily attracted to optical surfaces because of the low pressure and becomes the source of damage. LIDTs of mirrors have a little change in vacuum compared with in atmosphere when the organic contamination is wiped off. The results indicate that organic contamination is a significant reason to decrease the LIDT. N(2) molecules in vacuum can reduce the influence of the organic contaminations and prtectect high reflectance coatings. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：5990 / 5993
页数：4
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