Design of a highly reflective interference coating

Ivan Tereschenko; Hui Li; Lyudmila Gubanova

doi:10.1117/12.2575400

10 October 2020 Design of a highly reflective interference coating

Ivan Tereschenko, Hui Li, Lyudmila Gubanova

Proceedings Volume 11548, Optical Design and Testing X; 115481Y (2020) https://doi.org/10.1117/12.2575400
Event: SPIE/COS Photonics Asia, 2020, Online Only

Conference Poster

Abstract

The design of a highly reflective interference coating with the ability to control the laser induced damage threshold is calculated. The coating consists of twenty-five quarter-wave layers formed of silicon nitride and silicon dioxide with a sublayer of silver on an optical element made of quartz glass grade KU-1. One of the layers which was formed from silicon nitride has a half-wave thickness to obtain a structure like a Fabry-Perot interferometer. A relationship is established between the structure of the interference coating and the magnitude of the electric field strength in the layers when exposed to laser radiation. The introduction of a sublayer made of silver deposed on a substrate into the construction of a dielectric multilayer coating allows one to obtain a reflection coefficient at a control wavelength of greater than 99%. In this case, the fraction of laser radiation incident on the silver sublayer is less than 0.5%.

Citation Download Citation

Ivan Tereschenko, Hui Li, and Lyudmila Gubanova "Design of a highly reflective interference coating", Proc. SPIE 11548, Optical Design and Testing X, 115481Y (10 October 2020); https://doi.org/10.1117/12.2575400

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