Dielectric mirror with high reflectance at 266 nm wavelength for ozone lidar
V.S. Kuznetsov1, M.M. Zinovev1,2, N.N. Yudin1,2, O.A. Romanovskii2, A.A. Nevzorov2, S.V. Yakovlev2, S.A. Sadovnikov2, A.L. Khudoley3, D.V. Vlasov1
1Tomsk State University, Tomsk, Russia
2V.E. Zuev Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
3A. V. Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus, Republic of Belarus, Minsk, Belarus
Keywords: dielectric mirror, ion beam spultering, UV coating, ozone lidar, interference coating
Abstract
A dielectric mirror with high reflectance at a wavelength of 266 nm has been designed for use in ultraviolet lidar systems for ozone concentration monitoring. A multilayer interference coating based on HfO2 and SiO2 was manufactured and optimized using experimentally obtained dispersion data. The effect of thermal annealing on the optical properties of the coating was investigated, and a temperature limit was identified, excess of which leads to structural degradation. The results can be used in the design of highly efficient optical elements for ultraviolet differential absorption lidars, as well as other laser systems which require UV dielectric mirrors.
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