235 W high-power dual-end-diode-pumped Tm:YLF Innoslab laser

Qunlong Long; Jimeng Gao; Qingwen Han; Lei Wang; Yong He; Yefei Mao

doi:10.1117/12.2689170

31 July 2023 235 W high-power dual-end-diode-pumped Tm:YLF Innoslab laser

Qunlong Long, Jimeng Gao, Qingwen Han, Lei Wang, Yong He, Yefei Mao

Proceedings Volume 12747, Third International Conference on Optics and Image Processing (ICOIP 2023); 1274705 (2023) https://doi.org/10.1117/12.2689170
Event: Third International Conference on Optics and Image Processing (ICOIP 2023), 2023, Hangzhou, China

Abstract

We demonstrated a high-power Tm:YLF slab laser dual-end-pumped by two diode-bar stacks. A continuous-wave (CW) laser output of 235 W at 1.91 μm was obtained under a total incident pump power of 698 W. The corresponding slope efficiency was 42.4%, and the optical conversion efficiency was 33.7%. At the output power of 200 W, the beam quality factors M² were calculated to be 500 and 2.9 in the horizontal and vertical direction, respectively. In addition, we simulated the temperature distribution of Tm:YLF slab crystal under the maximum output power using the simulation software of COMSOL. Theoretically, we analyzed the focal length of the thermal lens, the spot size of the fundamental mode, and the stability parameter of the cavity. The experimental results and theoretical analysis indicated that the Tm:YLF Innoslab laser was a promising candidate for high-power applications laser technology.

Citation Download Citation

Qunlong Long, Jimeng Gao, Qingwen Han, Lei Wang, Yong He, and Yefei Mao "235 W high-power dual-end-diode-pumped Tm:YLF Innoslab laser", Proc. SPIE 12747, Third International Conference on Optics and Image Processing (ICOIP 2023), 1274705 (31 July 2023); https://doi.org/10.1117/12.2689170

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