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Proceedings Paper

Thermal analysis of high-power solid state laser with a Gaussian heat density deposition
Author(s): Wenjie Xie; Siu Chung Tam; Hongru Yang; Jianhui Gu; Gang Zhao; Yee Loy Lam; Chan Hin Kam
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Paper Abstract

Development of high power solid state laser makes us notice that thermal conductivity and heat expansion coefficient of laser crystal are not constant as temperature is increased. When we assume the heat density in the laser crystal is uniform, the temperature and stress profiles are on- quadratic, and the temperature and stress in laser crystal are higher than those we treat thermal conductivity and heat expansion coefficient as constants. Actually, it is difficult to achieve uniform heat density. We apply end- pumping geometry to side-pumping geometry, and assume the heat density in any cross section of the laser crystal rod is Gaussian profile. Then optical to optical efficiency will be very high due to excellent overlap between optical pumping volume and mode volume. We simulated the temperature and stress profiles in this situation using finite element analysis.

Paper Details

Date Published: 4 November 1999
PDF: 8 pages
Proc. SPIE 3898, Photonic Systems and Applications in Defense and Manufacturing, (4 November 1999); doi: 10.1117/12.368508
Show Author Affiliations
Wenjie Xie, Nanyang Technological Univ. (United States)
Siu Chung Tam, Nanyang Technological Univ. (Singapore)
Hongru Yang, Nanyang Technological Univ. (Singapore)
Jianhui Gu, Nanyang Technological Univ. (Singapore)
Gang Zhao, Nanyang Technological Univ. (Singapore)
Yee Loy Lam, Nanyang Technological Univ. (Singapore)
Chan Hin Kam, Nanyang Technological Univ. (Singapore)


Published in SPIE Proceedings Vol. 3898:
Photonic Systems and Applications in Defense and Manufacturing
Yee Loy Lam; Koji Ikuta; Metin S. Mangir, Editor(s)

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