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Proceedings Paper

Fluorescence of mitigated laser damage in fused silica
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Paper Abstract

In the field of laser-induced surface damage, it has been shown that localized re-fusion of silica can be used as a mean to mitigate the damage and therefore stop its growth before the use of the optical component is impaired. In this paper, this localized re-fusion was produced using a continuous CO2 laser. As the damage is reshaped, we observed that a ring of evaporated silica is systematically deposited around the mitigated damage. This evaporated silica is likely to be non-stoechiometric and therefore to present absorption and luminescence properties. Thus we decided to perform photoluminescence measurements in order to analyse the mitigated damages. We performed fluorescence imaging and spectroscopy using 351nm continuous laser excitation. Different experimental conditions were used for the re-fusion process and the consequences on the photoluminescence properties were studied. We also compared these properties to the properties of non-mitigated damages.

Paper Details

Date Published: 21 February 2005
PDF: 9 pages
Proc. SPIE 5647, Laser-Induced Damage in Optical Materials: 2004, (21 February 2005); doi: 10.1117/12.585045
Show Author Affiliations
Pierre Barritault, CEA-LETI (France)
Philippe R. Bouchut, CEA-LETI (France)
Herve Bercegol, CEA-CESTA (France)
Patrick Chaton, CEA-LETI (France)
Guillaume Ravel, CEA-LETI (France)

Published in SPIE Proceedings Vol. 5647:
Laser-Induced Damage in Optical Materials: 2004
Gregory J. Exarhos; Arthur H. Guenther; Norbert Kaiser; Keith L. Lewis; M. J. Soileau; Christopher J. Stolz, Editor(s)

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