Femtosecond Laser Damage Comparison between Silica/Hafnia Nanolaminates vs. Mixed Material Coatings for High Power Laser Optics

Abstract

Two layer anti-reflection coatings (Air/SiO2/HfSiO/substrate. vs Air/SiO2/Hf-SiO2 nanolaminates/substrate) were tested with p-polarized 77 fs 1030 nm laser pulses. Damage threshold fluence of the sample with nanolaminate was ~ 2/3 of the damage fluence of the mixed layer sample.