Chinese Optics Letters, 2006, 4 (2): 105, Published Online: Jun. 6, 2006  

A moisture-resistant antireflective coating by sol-gel process for neodymium-doped phosphate laser glass Download: 630次

Author Affiliations
1 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
2 Macromolecular Material Faculty of Fudan University, Shanghai 200433
Abstract
Using methyl triethoxysilicane as precursor, a moisture-resistant coating for neodymium-doped laser glass was developed by the sol-gel process. Colloidal silica was added in coating solution as modifier. The refractive index of this coating varied from 1.31 to 1.42. A porous antireflective (AR) silica coating with the index of 1.27 was coated on the moisture-resistant coating surface. The two-layer coating possessed transmission up to 99.1% at wavelength of 966 nm, surface root-mean-square (RMS) roughness of 1.245 nm, and roughness of average (RA) of 0.961 nm. In the case of laser of 1053-nm laser wavelength and 1-ns pulse duration, the damage threshold of the two-layer coatings was more than 15 J/cm2.

Ruijun Liu, Ruoyu Zhan, Yongxing Tang, Jianqiang Zhu. A moisture-resistant antireflective coating by sol-gel process for neodymium-doped phosphate laser glass[J]. Chinese Optics Letters, 2006, 4(2): 105.

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