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17 April 2020 Numerical simulation of thermal effect in fused silica irradiated by nanosecond high repetition rate laser
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Proceedings Volume 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications; 114552F (2020) https://doi.org/10.1117/12.2563845
Event: Sixth Symposium on Novel Photoelectronic Detection Technology and Application, 2019, Beijing, China
Abstract
A calculation model for high repetition rate nanosecond laser irradiation on fused silica is established based on the classical Fourier heat conduction theory and thermal elastic mechanical theory. The temperature fields and thermal stress fields are obtained with the finite element method. The temperature evolution on the surface for different laser parameters are simulated and analyzed. The results indicate that the temperature and thermal stress accumulation are severe at high repetition rates. The heat accumulation is related to laser parameters such as fluence F, repetition rate f, and laser pulse number N irradiated on the sample. The thermal stress field reveals that the thermal stress on the fused silica surface has a circular distribution, the maximum von Mises stress in the radial direction is at the edge of the spot and the maximum von Mises stress in the axial direction is at the axial center. This work may provide some guidance for laser-induced damage under nanosecond high repetition rate laser irradiation.
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Kai Ke, Fan Gao, Xiang Zhang, and Xiao Yuan "Numerical simulation of thermal effect in fused silica irradiated by nanosecond high repetition rate laser", Proc. SPIE 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications, 114552F (17 April 2020); https://doi.org/10.1117/12.2563845
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