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Proceedings Paper

Influence of local inhomogeneity of refractive index on laser damage
Author(s): Vitali E. Gruzdev; Mikhail N. Libenson
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Paper Abstract

Resonant effect connected with nonlinear light propagation through dielectric with small non-absorbing microinclusion is considered. It can play important role in initiating of laser-induced damage of transparent materials through local increasing of laser intensity inside and near the microinclusion. The effect is developing of field instability in nonabsorbing microinclusions resulting from excitation of resonant mode through inducing of variations of refractive index. It is shown that transparent microinclusion can initiate about 10 times local increase of laser intensity accompanied by positive feedback. If the electric field strength exceeds damage threshold during nonlinear evolution in the inclusion then developing of field instability results in damage of micro-inclusion before electric field is stabilized at certain upper level determined by ionization processes. There estimated threshold of field instability is about several MV/cm. Its dependence on material and radiation parameters is studied.

Paper Details

Date Published: 29 May 2002
PDF: 8 pages
Proc. SPIE 4748, ICONO 2001: Fundamental Aspects of Laser-Matter Interaction and Physics of Nanostructures, (29 May 2002); doi: 10.1117/12.468962
Show Author Affiliations
Vitali E. Gruzdev, S.I. Vavilov State Optical Institute (Russia)
Mikhail N. Libenson, S.I. Vavilov State Optical Institute (Russia)

Published in SPIE Proceedings Vol. 4748:
ICONO 2001: Fundamental Aspects of Laser-Matter Interaction and Physics of Nanostructures
Anatoly V. Andreev; Pavel A. Apanasevich; Vladimir I. Emel'yanov; Alexander P. Nizovtsev, Editor(s)

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