Theory of laser-induced damage to optical coatings: inclusion-initiated thermal explosion mechanism

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

doi:10.1117/12.180892

28 July 1994 Theory of laser-induced damage to optical coatings: inclusion-initiated thermal explosion mechanism

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

Proceedings Volume 2114, Laser-Induced Damage in Optical Materials: 1993; (1994) https://doi.org/10.1117/12.180892
Event: Laser-Induced Damage in Optical Materials: 1993, 1993, Boulder, CO, United States

Abstract

The theory of laser induced damage to an optical single-layer dielectric film (coating) initiated by an absorbing inclusion is presented. The damage model based on the photoionization mechanism due to thermal radiation of the laser heated inclusion is analyzed. Dependences of the laser induced damage threshold upon coating/substrate band-gap ratio and absorption cross-section ratio, and upon coating thickness are derived from a solution of heat and electron diffusion equations. The coating thickness dependence predicted is compared with experimental data.

Citation Download Citation

M. F. Koldunov, Alexander A. Manenkov, and I. L. Pocotilo "Theory of laser-induced damage to optical coatings: inclusion-initiated thermal explosion mechanism", Proc. SPIE 2114, Laser-Induced Damage in Optical Materials: 1993, (28 July 1994); https://doi.org/10.1117/12.180892

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