Laser-induced damage resistance of UV coatings on fused silica and CaF2

Byungil Cho; Andy Lyu; Mark Feldman

doi:10.1117/12.2007286

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4 December 2012 Laser-induced damage resistance of UV coatings on fused silica and CaF₂

Byungil Cho, Andy Lyu, Mark Feldman

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Proceedings Volume 8530, Laser-Induced Damage in Optical Materials: 2012; 853029 (2012) https://doi.org/10.1117/12.2007286
Event: SPIE Laser Damage, 2012, Boulder, Colorado, United States

Abstract

The laser damage resistance (LDR) is a measure of the laser fluence that a coating can withstand without damaging when exposed to a large number of pulses. The LDR of UV coatings has been studied at 266 nm on two common substrate materials. Significantly higher values for the LDR have been measured for the same coating deposited on CaF₂ substrate compared to fused silica substrates. Various parameters such as the surface roughness, the absorption and the subsurface damage of these quite different materials were measured in an effort to explain the performance difference. The laser damage morphologies of the coatings were also studied.

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Byungil Cho, Andy Lyu, and Mark Feldman "Laser-induced damage resistance of UV coatings on fused silica and CaF₂", Proc. SPIE 8530, Laser-Induced Damage in Optical Materials: 2012, 853029 (4 December 2012); https://doi.org/10.1117/12.2007286

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