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Proceedings Paper

New method to measure the ultrashort thermal focal length of high-power solid state laser
Author(s): Baigang Zhang; Jianquan Yao; Degang Xu; Yizhong Yu; Tao Wang; Jin Chen; Peng Wang
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Paper Abstract

Thermal lens effect is a very important factor in designing stable resonators for high-power solid-state laser pumped by laser diodes. In a symmetric plane-parallel resonator , if the thermal lens of the laser crystal is close to a thin lens, according to the theory of transfer matrix we can get that there is a critical hollow point where the resonator changes from stable region to unstable state, then back to stable region. So we can measure the ultrashort thermal focal length of high-power solid-state laser based on this fact. We used this method to measure the ultrashort thermal focal length of a 100W magnitude Nd:YAG laser. The experimental results have shown this is a simple and effective technique.

Paper Details

Date Published: 5 September 2002
PDF: 4 pages
Proc. SPIE 4914, High-Power Lasers and Applications II, (5 September 2002); doi: 10.1117/12.481758
Show Author Affiliations
Baigang Zhang, Tianjin Univ. and Huazhong Univ. of Science and Technology (China)
Jianquan Yao, Tianjin Univ. (China)
Degang Xu, Tianjin Univ. (China)
Yizhong Yu, Tianjin Univ. (China)
Tao Wang, Tianjin Univ. (China)
Jin Chen, Tianjin Univ. (China)
Peng Wang, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 4914:
High-Power Lasers and Applications II
Dianyuan Fan; Keith A. Truesdell; Koji Yasui, Editor(s)

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