Evaluation of UV absorption coefficient in laser-modified fused silica

R. A. Negres, M. W. Burke, S. B. Sutton, P. Demange, M. D. Feit, S. G. Demos

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Laser-induced damage in transparent dielectrics leads to the formation of laser-modified material as a result of exposure to extreme localized temperatures and pressures. In this work, an infrared thermal imaging system in combination with a fluorescence microscope is used to map the dynamics of the local surface temperature and fluorescence intensity under cw, UV excitation of laser-modified fused silica within a damage site. The energy deposited via linear absorption mechanisms and the absorption coefficient of the modified material are estimated based on a thermal diffusion model. In addition, irreversible changes in the absorption following extended laser exposure were observed.

Original languageEnglish (US)
Article number061115
JournalApplied Physics Letters
Issue number6
StatePublished - 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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