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31 October 2014 Simulations of CO2 laser interaction with silica and comparison to experiments
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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.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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