Simulations of CO2 laser interaction with silica and comparison to experiments

Thomas Doualle; Laurent Gallais; Philippe Cormont; David Hébert; Patrick Combis; Jean-Luc Rullier

doi:10.1117/12.2068194

31 October 2014 Simulations of CO₂ laser interaction with silica and comparison to experiments

Thomas Doualle, Laurent Gallais, Philippe Cormont, David Hébert, Patrick Combis, Jean-Luc Rullier

Proceedings Volume 9237, Laser-Induced Damage in Optical Materials: 2014; 92371R (2014) https://doi.org/10.1117/12.2068194
Event: SPIE Laser Damage, 2014, Boulder, Colorado, United States

Abstract

Localized CO₂ laser heating of silica glass has demonstrated its ability to mitigate surface damage on optics used for high power laser applications. The parameters for this process such as the power, the beam size and the exposition time are however critical and some fundamental studies on the silica behavior under CO₂ laser irradiation are required to develop the processes. It is necessary for instance to understand the silica transformation, the material ejection and the thermo-mechanical stresses induced by the laser heating and subsequent cooling. A thermo-mechanical model based on finite-element method has been used to calculate the temperature of silica heated by CO₂ laser irradiation and the residual stress after cooling of the samples. The model, as the different parameters used for calculations, are detailed in this paper and the numerical results are compared to different dedicated experimental studies.

Citation Download Citation

Thomas Doualle, Laurent Gallais, Philippe Cormont, David Hébert, Patrick Combis, and Jean-Luc Rullier "Simulations of CO₂ laser interaction with silica and comparison to experiments", Proc. SPIE 9237, Laser-Induced Damage in Optical Materials: 2014, 92371R (31 October 2014); https://doi.org/10.1117/12.2068194

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