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Optical Engineering

Theory of laser-induced inclusion-initiated damage in optical materials
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Paper Abstract

We present the results of theoretical studies of the laser-induced damage in transparent solids containing absorbing inclusions. The investigation is based on the inclusion-initiated thermal explosion model. Key aspects of the model are considered: thermal instability initiated by the inclusions; a mechanism of photoionization of a surrounding layer of a host material by a thermal ultraviolet-radiation of laser-heated inclusions; the thermal instability kinetics, and an associated pulse-width dependence of the laser-induced damage threshold. Also, statistical features of the damage, caused by random spatial distribution of the inclusions in the materials, and a final stage of the damage process-a mechanical stress-produced crack formation-are analyzed. A comparison of the theoretical results, related to the pulse-width dependence of the damage threshold, with experimental data for some typical optical materials in a wide pulse-width range is presented.

Paper Details

Date Published: 18 September 2012
PDF: 11 pages
Opt. Eng. 51(12) 121811 doi: 10.1117/1.OE.51.12.121811
Published in: Optical Engineering Volume 51, Issue 12
Show Author Affiliations
Modest Koldunov, A. M. Prokhorov General Physics Institute (Russian Federation)
Alexander A. Manenkov, A. M. Prokhorov General Physics Institute (Russian Federation)

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