A study of ns-LIDT of ion-beam assisted coatings of optical windows

Several sets of fused silica and BK7 windows were anti-reflection (AR) coated for 1030 nm wavelength using ion-assisted e-beam deposition under various conditions (substrate temperature, ion-beam energy). Samples were tested for laser-induced damage threshold (LIDT) at 1030 nm, 10 ns with 10 Hz repetition rate in 1000-on-1 mode according to ISO 21254 standard. Measured damage thresholds at normal (0 deg) incidence were compared and discussed.