Feng Gao, Yunpeng Cai, Zhenxu Bai, Yaoyao Qi, Bingzheng Yan, Yulei Wang, Zhiwei Lv, Jie Ding. SHG efficiency of nonlinear crystal walk-off effect[J]. Infrared and Laser Engineering, 2023, 52(8): 20230254

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- Infrared and Laser Engineering
- Vol. 52, Issue 8, 20230254 (2023)

Fig. 1. Pumping of parallel beam: (a) SHG optical path; (b) Internal beam distribution of SHG crystal

Fig. 2. Internal beam distribution of focused beam pumped SHG crystal

Fig. 3. (a) SHG optical path; (b) The SHG efficiency varies with the energy of the pump laser, with or without the walk-off effect; (c) The SHG efficiency of focused and parallel beams varies with the energy of the pump laser

Fig. 4. The variation of SHG efficiency with pump laser energy. (a) Different M 2 of fundamental laser; (b) Different focal lengths of focusing lenses; (c) Different radius of fundamental laser

Fig. 5. The variation of SHG efficiency with pump laser energy. (a) Different waist radius; (b) Different divergence angle

Fig. 6. Changes in SHG efficiency and peak power density. (a) Different SHG crystals; (b) Different pump wavelengths of LBO crystal

Fig. 7. (a) The variation of SHG efficiency with pump laser energy for different LBO lengths; (b) The variation of SHG efficiency with crystal length
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Table 1. Comparison of SHG crystal parameters
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Table 2. Comparison of pump and LBO crystal parameters

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