Improvement of the laser-induced damage resistance of optical coatings in vacuum environments

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• 作者：Yangjun Li ; Xiulan Ling ; Gaowang ; Yuanan Zhao ; Xiaofeng Liu ; Ji ; a Shao
• 关键词：42.79.Wc ; 81.70.Fy ; 68.37.Hk
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2013
• 出版时间：November, 2013
• 年：2013
• 卷：124
• 期：21
• 页码：5154-5157
• 全文大小：790 K

文摘

Two measures were presented to improve the laser-induced damage resistance of the optical films used in vacuum environments. Firstly, the impact of a few O₂, N₂ and He₂ introduced in vacuum on the laser-induced damage threshold of the dielectric mirror coatings were investigated. Then, laser conditioning effects in atmosphere environments on the laser-induced damage threshold of the dielectric mirror coatings used in vacuum environments were also investigated. It was found that a few O₂, N₂ introduced in vacuum can effectively improve the laser damage resistance of the optical films in vacuum environment due to the resistance to air-vacuum effect. However, a few He₂ have no this effect on laser induced damage threshold (LIDT) of the films. In addition, laser conditioning in atmosphere can also effectively improve the LIDT of the optical thin films used in vacuum environment.