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Proceedings Paper

Pump and probe damage testing for investigation of transient material modifications associated with laser damage in optical materials
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Paper Abstract

Laser-induced breakdown in the bulk of transparent dielectric materials is associated with the generation of extreme localized conditions of temperatures and pressures. In this work, we perform pump and probe damage testing experiments to investigate the evolution of transient absorption by the host material arising from modifications following confined laser energy deposition in fused silica and DKDP materials. Specifically, we measure the size of the damage sites observed in the region of spatial overlap between the pump and probe pulses versus probe time delay and energy. Results of this proof-of-principle experimental work confirm that material modifications under extreme conditions created during a damage event include transient optical absorption. In addition, we found that the relaxation times of the induced absorption are very distinct for DKDP and SiO2 even under identical excitation conditions, on the order of 100 ns and 100 μs, respectively.

Paper Details

Date Published: 20 December 2007
PDF: 6 pages
Proc. SPIE 6720, Laser-Induced Damage in Optical Materials: 2007, 672019 (20 December 2007); doi: 10.1117/12.750091
Show Author Affiliations
R. A. Negres, Lawrence Livermore National Lab. (United States)
M. D. Feit, Lawrence Livermore National Lab. (United States)
P. DeMange, Lawrence Livermore National Lab. (United States)
J. D. Bude, Lawrence Livermore National Lab. (United States)
S. G. Demos, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 6720:
Laser-Induced Damage in Optical Materials: 2007
Gregory J. Exarhos; Arthur H. Guenther; Keith L. Lewis; Detlev Ristau; M. J. Soileau; Christopher J. Stolz, Editor(s)

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