Thermal effects analysis of end-pumped Er:YAG rod and slab by using finite element method

Fangfang Hou; Chunqing Gao

doi:10.1117/12.2542737

12 March 2020 Thermal effects analysis of end-pumped Er:YAG rod and slab by using finite element method

Fangfang Hou, Chunqing Gao

Proceedings Volume 11437, 2019 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications; 1143709 (2020) https://doi.org/10.1117/12.2542737
Event: 2019 International Conference on Optical Instruments and Technology, 2019, Beijing, China

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.

Citation Download Citation

Fangfang Hou and Chunqing Gao "Thermal effects analysis of end-pumped Er:YAG rod and slab by using finite element method", Proc. SPIE 11437, 2019 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications, 1143709 (12 March 2020); https://doi.org/10.1117/12.2542737

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KEYWORDS

Er:YAG lasers

Doping

Thermal effects

Laser crystals

Finite element methods

Thermal modeling

Solid state lasers

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