ISSN 0021-3454 (print version)
ISSN 2500-0381 (online version)
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3
Issue
vol 60 / MARCH, 2017
Article
UDC 535.212

STUDY OF RADIATION RESISTANCE OF DIELECTRIC COATING DEPOSITED ON OPTICAL SURFACE

S. V. Gagarsky
ITMO University, Saint Petersburg, 197101, Russian Federation; senior research ascientist


V. S. Ermolaev
ITMO University, Department of Laser Technologies and Systems; Engineer


A. N. Sergeev
ITMO University, Saint Petersburg, 197101, Russian Federation; assistant


M. V. Puzyk
Herzen State Pedagogical University of Russia, Department of Inorganic Chemistry, St. Petersburg;


Abstract.   A method for laser induced damage (LID) threshold measurement both within volume of transparent dielectrics and at surface of high-energy laser optical components is proposed. The technique makes it possible to determine the optical breakdown statistics in a chosen area of optical element for single-shot exposure and for accumulation regime. A technique of additional chemical-mechanical surface polishing is proposed, the LID threshold for coatings of optical components with surfaces subjected to the additional processing is measured and compared with regular treatment.
Keywords: radiation resistance, transparent dielectric, laser-induced breakdown, surface finishing.