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Laser supported solid state absorption fronts in silica [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2010.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
PDF-file: 6 pages; size: 1.1 Mbytes
Additional Creators
Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
We develop a model based on simulation and experiment that explains the behavior of solid-state laser-supported absorption fronts generated in fused silica during high intensity (up to 5GW/cm²) laser exposure. We find that the absorption front velocity is constant in time and is nearly linear in laser intensity. Further, this model can explain the dependence of laser damage site size on these parameters. This behavior is driven principally by the temperature-activated deep sub band-gap optical absorptivity, free electron transport and thermal diffusion in defect-free silica for temperatures up to 15,000K and pressures < 15GPa. The regime of parameter space critical to this problem spans and extends that measured by other means. It serves as a platform for understanding general laser-matter interactions in dielectrics under a variety of conditions.
Report Numbers
E 1.99:llnl-jrnl-423847
llnl-jrnl-423847
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Note
Published through SciTech Connect.
02/09/2010.
"llnl-jrnl-423847"
Physical Review B, vol. 82, no. 18, November 30, 2010, pp. 184304 82 18 ISSN 1098-0121 FT
Carr, C W; Bude, J D.
Funding Information
W-7405-ENG-48
View MARC record | catkey: 14103616