Yan Xiongwei, Jiang Xingying, Wang Zhenguo, Zheng Jiangang, Li Min, Xiao Kaibo. Cryogenic Liquid-Cooled Yb∶YAG Bulk Amplifier[J]. Chinese Journal of Lasers, 2019, 46(9): 901008
- Chinese Journal of Lasers
- Vol. 46, Issue 9, 901008 (2019)
Fig. 1. Schematic of side-cooled bulk Yb∶YAG laser amplifier
Fig. 2. Structure of Yb∶YAG laser crystal
Fig. 3. Propagation and reflection of ASE beams in triangular-section channel
Fig. 4. Simulation of local ray tracing on side of bulk Yb∶YAG crystal
Fig. 5. Schematic of Yb ion energy level and Stark sublevel
Fig. 6. Energy storage in amplifier at different temperatures and pumping intensities with 1-ms pump pulse duration. (a) Small signal gain coefficient; (b) energy storage efficiency
Fig. 7. Output energy as a function of injection energy of four-pass amplification at optimized temperature
Fig. 8. Temperature distributions of laser crystal. (a) Crystal without triangular-section channels on side; (b) crystal with triangular-section channels on side
Fig. 9. Photo of Yb∶YAG laser amplifier
Fig. 10. Simulation and experimental results of four-pass amplification
Fig. 11. Analysis of far-field spot of amplifier output. (a) Distribution of relative intensity in far field; (b) curve of energy concentration
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