High-Strength Optical Coatings for Single-Crystal ZnGeP2 by the IBS Method Using Selenide and Oxide Materials

The paper presents the results on development of an optical coating for a single-crystal ZnGeP2 substrate based selenide-oxide pair materials (ZnSe/Al2O3). obtained ensures operation OPO in mid-IR range up to 5 μm wavelengths. possibility ZnSe sputtering by IBS method is shown. has high laser-induced damage threshold (LIDT) value at 2097 µm wavelength: WoE=3.51 J/cm2 energy density and WoP= 101 W/cm2 power 10 KHz pulse repetition frequency duration 35 ns. Thus, it shown first time that ZnSe/Al2O3 can be used deposition coatings with LIDT values elements operating range.