Abstract

A parametric study of the threshold for pulsed-laser-induced damage with refractive index for surfaces and thin films of several transparent optical materials is reported. An empirical analysis of the experimental results obtained using 1.06-μm radiation in ~40-nsec pulses, together with other published data, yields, to first order, a 1/(n² − 1) dependence for the threshold optical electric field. The proposed scaling law describes quite well the variation of damage threshold for optical surfaces ranging in refractive index from 1.38 to 2.49. Similar agreement is noted for homogeneous thin films deposited on a fused silica substrate; however, deviations are noted for inhomogeneous films.

© 1979 Optical Society of America

Laser induced damage in optical materials: tenth ASTM symposium

Alexander J. Glass and Arthur H. Guenther
Appl. Opt. 18(13) 2112-2129 (1979)

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J. Opt. Soc. Am. 69(6) 847-858 (1979)

Temperature dependence of laser-induced damage threshold of optical coatings at different pulse widths

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