Influence of Thermal Distortion of Mirrors in Laser Resonators on Laser Modes

Jun Xi Yan; Fang Peng; Yu Feng Peng

doi:10.4028/www.scientific.net/AMM.214.223

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 214Influence of Thermal Distortion of Mirrors in...

Influence of Thermal Distortion of Mirrors in Laser Resonators on Laser Modes

Abstract:

Taking into account the thermal absorption of laser light on laser mirror surface, the thermal deformation of the mirror substrate was analyzed. Influence of the thermal distortions of the mirror substrate on the laser resonant modes was calculated. The expressions for the field distributions of transverse laser modes with perturbation methods were derived. By comparing them with the elegant Hermite-Gaussian modes where there were no thermal distortions, the intensity profiles of the transverse laser modes versus the amount of the thermal deformation were obtained. The results show that the larger the thermal distortions of mirrors are, the wider the intensity profiles of the fundamental mode become, and the smaller the peak intensity becomes. Meanwhile, the high-order modes will be induced.

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Periodical:

Applied Mechanics and Materials (Volume 214)

Pages:

223-226

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.214.223

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Online since:

November 2012

Authors:

Jun Xi Yan, Fang Peng, Yu Feng Peng

Keywords:

Beam Characteristics, Mirrors, Resonators, Thermal Distortion

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