Fluorescence of mitigated laser damage in fused silica

Pierre Barritault; Philippe R. Bouchut; Herve Bercegol; Patrick Chaton; Guillaume Ravel

doi:10.1117/12.585045

21 February 2005 Fluorescence of mitigated laser damage in fused silica

Pierre Barritault, Philippe R. Bouchut, Herve Bercegol, Patrick Chaton, Guillaume Ravel

Proceedings Volume 5647, Laser-Induced Damage in Optical Materials: 2004; (2005) https://doi.org/10.1117/12.585045
Event: Boulder Damage Symposium XXXVI, 2004, Boulder, Colorado, United States

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.

Citation Download Citation

Pierre Barritault, Philippe R. Bouchut, Herve Bercegol, Patrick Chaton, and Guillaume Ravel "Fluorescence of mitigated laser damage in fused silica", Proc. SPIE 5647, Laser-Induced Damage in Optical Materials: 2004, (21 February 2005); https://doi.org/10.1117/12.585045

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