High-Strength Optical Coatings for Single-Crystal ZnGeP<sub>2</sub> by the IBS Method Using Selenide and Oxide Materials
Mikhail Zinovev,
Nikolay N. Yudin,
Vladimir Kuznetsov,
Sergey Podzyvalov,
Andrey Kalsin,
Elena Slyunko,
Alexey Lysenko,
Denis Vlasov,
Houssain Baalbaki
Affiliations
Mikhail Zinovev
Radiophysical Department, Laboratory of Radiophysical and Optical Methods for Studying the Environment, National Research Tomsk State University, 634050 Tomsk, Russia
Nikolay N. Yudin
Radiophysical Department, Laboratory of Radiophysical and Optical Methods for Studying the Environment, National Research Tomsk State University, 634050 Tomsk, Russia
Vladimir Kuznetsov
Institute of High Current Electronics, Akademichesky av. 2/3, 634055 Tomsk, Russia
Sergey Podzyvalov
Radiophysical Department, Laboratory of Radiophysical and Optical Methods for Studying the Environment, National Research Tomsk State University, 634050 Tomsk, Russia
Andrey Kalsin
Radiophysical Department, Laboratory of Radiophysical and Optical Methods for Studying the Environment, National Research Tomsk State University, 634050 Tomsk, Russia
Elena Slyunko
Radiophysical Department, Laboratory of Radiophysical and Optical Methods for Studying the Environment, National Research Tomsk State University, 634050 Tomsk, Russia
Alexey Lysenko
Radiophysical Department, Laboratory of Radiophysical and Optical Methods for Studying the Environment, National Research Tomsk State University, 634050 Tomsk, Russia
Denis Vlasov
Radiophysical Department, Laboratory of Radiophysical and Optical Methods for Studying the Environment, National Research Tomsk State University, 634050 Tomsk, Russia
Houssain Baalbaki
Radiophysical Department, Laboratory of Radiophysical and Optical Methods for Studying the Environment, National Research Tomsk State University, 634050 Tomsk, Russia
The paper presents the results on the development of an optical coating for a single-crystal ZnGeP2 substrate based on a selenide-oxide pair of materials (ZnSe/Al2O3). The obtained coating ensures the operation of OPO in the mid-IR range up to 5 μm wavelengths. The possibility of ZnSe sputtering by the IBS method is shown. The obtained optical coating has a high laser-induced damage threshold (LIDT) value at a 2097 µm wavelength: WoE=3.51 J/cm2 in energy density and WoP= 101 W/cm2 in power density at a 10 KHz pulse repetition frequency and a pulse duration of 35 ns. Thus, it is shown for the first time that the pair of materials ZnSe/Al2O3 can be used for the deposition of optical coatings by the IBS method with high LIDT values for ZnGeP2 optical elements operating in the mid-IR range.
