Multilayer antireflection optical coatings based on Nb, Si and Al oxides for nonlinear ZnGeP2 crystals

M. M. Zinovev; N. N. Yudin; A. S. Olshukov; A. Yu. Davydova

doi:10.1117/12.2644932

7 December 2022 Multilayer antireflection optical coatings based on Nb, Si and Al oxides for nonlinear ZnGeP₂ crystals

M. M. Zinovev, N. N. Yudin, A. S. Olshukov, A. Yu. Davydova

Proceedings Volume 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 123413E (2022) https://doi.org/10.1117/12.2644932
Event: 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2022, Tomsk, Russia

Abstract

The effect of the designed antireflection coatings based on Nb₂O₅/Al₂O₃ and Nb₂O₅/SiO₂ pairs of materials on the laserinduced damage threshold (LIDT) of ZnGeP₂ crystals at a wavelength of 2097 nm is shown. The coating was applied using the ion-beam sputtering (IBS) method. The LIDT of the sample coated with Nb₂O₅/SiO₂ was W_0d = 1.8 J/cm². The LIDT of a sample coated with Nb₂O₅/Al₂O₃ is W_0d = 2.35 J/cm². The presence of silicon conglomerates in the antireflection coating leads to a decrease the LIDT of a nonlinear crystal due to local thermomechanical stresses and scattering of the incident laser radiation.

Citation Download Citation

M. M. Zinovev, N. N. Yudin, A. S. Olshukov, and A. Yu. Davydova "Multilayer antireflection optical coatings based on Nb, Si and Al oxides for nonlinear ZnGeP₂ crystals", Proc. SPIE 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 123413E (7 December 2022); https://doi.org/10.1117/12.2644932

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