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Preparation of ultra-broadband antireflective coatings for amplifier blast shields by a sol–gel method

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Abstract

A type of $\unicode[STIX]{x1D706}/4$–$\unicode[STIX]{x1D706}/4$ ultra-broadband antireflective coating has been developed using modified low refractive silica and high refractive silica layers by a sol–gel dip coating method for amplifier blast shields of the Shen Guang II high power laser facility (SG-II facility). Deposition of the first layer (high refractive index silica) involves baking at $200\,^{\circ }\text{C}$ in the post-treatment step. The second layer (low refractive index, $n=1.20$) uses low refractive index silica sol modified by acid catalysis. Thermal baking at temperatures no less than $500\,^{\circ }\text{C}$ for 60 min offers chemical stability, ethanol scratch resistance, and resistance to washing with water. The average residual reflection of dual-side-coated fused silica glass was less than 1% in the spectral range from 450 to 950 nm. Transmission gain has been evaluated by taking into account angular light, and the results show that the transmission gain increases with increasing light incidence. Even at $60^{\circ }$, the transmission spectrum of the broadband antireflective coating effectively covered the main absorption peak of Nd:glass.

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DOI:10.1017/hpl.2017.28

收稿日期:2017-07-21

录用日期:2017-09-04

网络出版日期:2017-09-22

作者单位    点击查看

Huai Xiong:Key Laboratory of High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, ChinaUniversity of Chinese Academy of Sciences, Beijing 100049, China
Bin Shen:Key Laboratory of High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Zhiya Chen:Key Laboratory of High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Xu Zhang:Key Laboratory of High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Haiyuan Li:Key Laboratory of High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Yongxing Tang:Key Laboratory of High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Lili Hu:The Research and Development Center for High Power Laser Glass, Shanghai Institute of Optics and Fine Mechanics, Chinese?Academy of Sciences, Shanghai 201800, China

联系人作者:Huai Xiong(xhuai1998@siom.ac.cn)

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引用该论文

Huai Xiong, Bin Shen, Zhiya Chen, Xu Zhang, Haiyuan Li, Yongxing Tang, and Lili Hu, "Preparation of ultra-broadband antireflective coatings for amplifier blast shields by a sol–gel method," High Power Laser Science and Engineering 5(4), e29 (2017)

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