Wavelength dependence of laser damage in coatings

M. F. Koldunov; Alexander A. Manenkov; I. L. Pokotilo

doi:10.1117/12.274253

13 May 1997 Wavelength dependence of laser damage in coatings

M. F. Koldunov, Alexander A. Manenkov, I. L. Pokotilo

Proceedings Volume 2966, Laser-Induced Damage in Optical Materials: 1996; (1997) https://doi.org/10.1117/12.274253
Event: Laser-Induced Damage in Optical Materials: 1996, 1996, Boulder, CO, United States

Abstract

A model of laser-induced damage in optical coatings due to photoionization thermal explosion of absorbing inclusions proposed and analyzed in our previous work reasonably explained dependencies of the laser induced damage threshold (LIDT) on a material band-gap energy and a coating thickness. Continuing the analysis of the model in this paper we present results on a laser radiation wavelength dependence of LIDT. It is shown hat his dependence is determined mainly by two factors: wavelength dependencies of inclusion absorption cross section and absorption coefficient of conduction band electrons. A computer analysis done taking into account both factors. Effects of coating thickness and damage statistics are also investigated. Theoretical results are compared with experimental data.

Citation Download Citation

M. F. Koldunov, Alexander A. Manenkov, and I. L. Pokotilo "Wavelength dependence of laser damage in coatings", Proc. SPIE 2966, Laser-Induced Damage in Optical Materials: 1996, (13 May 1997); https://doi.org/10.1117/12.274253

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