外文题目: Preparation of ultra-broadband antireflective coatings for amplifier blast shields by a sol-gel method
作者: Xiong, Huai; Shen, Bin; Chen, Zhiya; Zhang, Xu; Li, Haiyuan; Tang, Yongxing; Hu, Lili
刊名: High Power Laser Sci. Eng.
年: 2017 卷: 5 文章编号：e29
英文关键词:
amplifier; antireflective coating; blast shields; sol-gel; ultra-broadband
BLASTSHIELDS
英文摘要:
A type of lambda/4-lambda/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 degrees 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 degrees 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 degrees, the transmission spectrum of the broadband antireflective coating effectively covered the main absorption peak of Nd:glass.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1017/hpl.2017.28


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