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Proceedings Paper

Thermal effects analysis of end-pumped Er:YAG rod and slab by using finite element method
Author(s): Fangfang Hou; Chunqing Gao
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Paper Abstract

The temperature and thermal stress distributions of end-pumped Er: YAG rod and slab are analyzed by using the finite element method. A thermal-structural coupling model is established for the thermal effects analysis of the crystal based on the steady heat conduction theory. The influences of the crystal structure parameters on the thermal effects inside the Er:YAG slabs and rods are discussed. The analysis results show that the slab structure can effectively improve the thermal distribution performance of the laser medium under the same clear aperture and pumping conditions, compared with the rod crystal. In addition, the thermal effects can be further reduced by increasing the width-to-thickness ratio of the slab. It is also found that a well-designed gradient doping technology can efficiently reduce thermal effects, resulting in the higher output power and beam quality than that in the uniform doping Er: YAG crystal.

Paper Details

Date Published: 12 March 2020
PDF: 9 pages
Proc. SPIE 11437, 2019 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications, 1143709 (12 March 2020); doi: 10.1117/12.2542737
Show Author Affiliations
Fangfang Hou, Beijing Institute of Technology (China)
Chunqing Gao, Beijing Institute of Technology (China)


Published in SPIE Proceedings Vol. 11437:
2019 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications
Zhiyi Wei; Chunqing Gao; Pu Wang; Franz X, Kärtner; Stefan A. Weber, Editor(s)

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