Damage on HfO2/SiO2 high-reflecting coatings under single and multiple Nd:YAG laser pulse irradiation
The single- and multi-shot damage behaviors of HfO2/SiO2 high-reflecting (HR) coatings under Nd:YAG laser exposure were investigated. Fundamental aspects of multi-shot laser damage, such as the instability due to pulse-to-pulse accumulation of absorption defect and structural defect effect, and the mechanism of laser induced defect generation, are considered. It was found in multi-shot damage, the main factors influencing laser-induced damage threshold (LIDT) are accumulation of irreversible changes of structural defects and thermal stress that induced by thermal density fluctuations.
Tao Wang：Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
Yuanan Zhao：Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
Jianda Shao：Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
备注：This work was supported by the National "863" Project of China. W. Gao's e-mail address is email@example.com
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Weidong Gao, Tao Wang, Yuanan Zhao, Jianda Shao, "Damage on HfO2/SiO2 high-reflecting coatings under single and multiple Nd:YAG laser pulse irradiation," Chinese Optics Letters 3(3), 179-180 (2005)