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Proceedings Paper

Computer simulation of nonlinear dynamics of high-power laser field in low-Q cylindrical defect embedded into transparent dielectric
Author(s): Vitali E. Gruzdev; Anastasia S. Gruzdeva; Mikhail N. Libenson
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Paper Abstract

The aim of our paper is to investigate possibility of local increasing of amplitude of high-power laser radiation in transparent microinclusions in dielectric media. There is presented theoretical approach to the problem allowing to show possibility of formation of unstable field structure in microsphere and microcylinder with near-resonant parameters. The instability is shown to develop as a result of laser- induced formation of sphere's or cylinder's eigenmode accompanied by positive feedback through laser-induced variation of refractive index. The instability is shown to have threshold depending on radiation and inclusion parameters. Computer modeling is used to get more detailed information about the described processes in dielectric cylinder. The presented results of modeling show dynamics of nonlinear evolution of high-power laser field in isotropic microcylinder. Several parametric dependences of instability threshold are measured using results of modeling. The presented results are discussed from the viewpoint of laser ablation and laser-induced damage of low-absorbing optical materials.

Paper Details

Date Published: 14 September 1998
PDF: 12 pages
Proc. SPIE 3343, High-Power Laser Ablation, (14 September 1998); doi: 10.1117/12.321520
Show Author Affiliations
Vitali E. Gruzdev, S.I. Vavilov State Optical Institute (Russia)
Anastasia S. Gruzdeva, S.I. Vavilov State Optical Institute (Russia)
Mikhail N. Libenson, S.I. Vavilov State Optical Institute (Russia)

Published in SPIE Proceedings Vol. 3343:
High-Power Laser Ablation
Claude R. Phipps, Editor(s)

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