Temperature dependence of nonlinear optical phenomena in silica glasses

K. Mikami; S. Motokoshi; M. Fujita; T. Jitsuno; M. Murakami

doi:10.1117/12.867240

29 November 2010 Temperature dependence of nonlinear optical phenomena in silica glasses

K. Mikami, S. Motokoshi, M. Fujita, T. Jitsuno, M. Murakami

Proceedings Volume 7842, Laser-Induced Damage in Optical Materials: 2010; 78420X (2010) https://doi.org/10.1117/12.867240
Event: Laser Damage Symposium XLII: Annual Symposium on Optical Materials for High Power Lasers, 2010, Boulder, Colorado, United States

Abstract

A linear increase of the laser-induced damage thresholds in silica glasses with decreasing the temperature was reported in this conference at last year. Various nonlinear phenomena should be generated in silica glasses besides the damage in high intensity. Temperature dependences of the nonlinear refractive indices and the SBS (stimulated Brillouin scattering) thresholds in silica glasses at temperature 173 K to 473 K were measured with single-mode Q-switched Nd:YAG laser at fundamental wavelength. As the result, the nonlinear refractive indices increased with decreasing temperature. Because the change was not enough to explain the temperature dependence of laser-induced damage thresholds, the temperature dependence of nonlinear refractive indices would be negligible on laser-induced damage thresholds. On the other hand, the SBS thresholds also increased with decreasing temperature. This result means that acoustic phonons arise easily at high temperature. Probably, the SBS phenomenon is one of reasons for temperature dependence of laser-induced damage thresholds.

Citation Download Citation

K. Mikami, S. Motokoshi, M. Fujita, T. Jitsuno, and M. Murakami "Temperature dependence of nonlinear optical phenomena in silica glasses", Proc. SPIE 7842, Laser-Induced Damage in Optical Materials: 2010, 78420X (29 November 2010); https://doi.org/10.1117/12.867240

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