Design and preparation of laser film on sapphire substrate

Shao-kun Dang; Jun-qi Xu; Jun-hong Su; Fang Guo; Yao-jin Cheng

doi:10.1117/12.2067890

6 August 2014 Design and preparation of laser film on sapphire substrate

Shao-kun Dang, Jun-qi Xu, Jun-hong Su, Fang Guo, Yao-jin Cheng

Proceedings Volume 9281, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 92811S (2014) https://doi.org/10.1117/12.2067890
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China

Abstract

Sapphire crystal as a kind of good material has a good transmittance in the ultraviolet, visible, infrared, which was widely used in the high-intensity laser system as the window material. Anti-reflection thin films on sapphire substrate were commonly used in high-energy laser system in the middle infrared bands 3~5μm and these thin films are very easily damaged for high energy laser system. In this paper, we adopt thermal evaporation technique on the sapphire substrate was prepared by design of single layer and multilayer anti-reflection coatings system so that the infrared transmittance satisfy the design requirements. The results of transmittance and laser damage performance tests show that the anti-reflection coating of 3~5μm transmittance is more than 97% on average, Laser-induced damage threshold (LIDT) is more than 5J/cm² (1064nm), which means that this method could obtain a high-quality laser film.

Citation Download Citation

Shao-kun Dang, Jun-qi Xu, Jun-hong Su, Fang Guo, and Yao-jin Cheng "Design and preparation of laser film on sapphire substrate", Proc. SPIE 9281, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 92811S (6 August 2014); https://doi.org/10.1117/12.2067890

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KEYWORDS

Sapphire

Thin films

Transmittance

Refractive index

Antireflective coatings

Laser induced damage

Infrared radiation

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