Xiangxiang Li, Yuntao Bai, Xin Ding, Guoxin Jiang, Peng Lei, Xingrui Zhang, Yang Sun, Jiangeng Du, Fangying Wei, Ruofan Zhang, Liang Wu, Guizhong Zhang, Jianquan Yao. High efficiency, low threshold, high repetition rate H-β Fraunhofer line light at 486.1 nm generation by an intracavity frequency-doubled optical parametric oscillator[J]. Chinese Optics Letters, 2023, 21(9): 091403
- Chinese Optics Letters
- Vol. 21, Issue 9, 091403 (2023)
Fig. 1. Schematic of high-efficiency, low threshold, high repetition rate H-β Fraunhofer line light at 486.1 nm generation by an intracavity frequency-doubled SR-OPO.
Fig. 2. Fundamental-mode beam size of the signal wave in (a) sagittal plane and (b) tangential plane.
Fig. 3. (a) Power transfer and (b) conversion efficiency of the signal output in SR-OPO at different transmittances (T = 20%, 30%, 40%).
Fig. 4. (a) Spectrum of 972.2 nm at the maximum power of 1.9 W (FWHM); (b) oscilloscope trace of 972.2 nm at 1.9 W; inset, pulse train of 972.2 nm.
Fig. 5. (a) Power transfer at 486.1 nm; inset, oscilloscope trace of 486.1 nm at the maximum power of 1.6 W; (b) spectrum of 486.1 nm at 1.6 W.
Fig. 6. (a) Beam quality measurement of the 486.1 nm output at the maximum power of 1.6 W; inset, beam profile collected; (b) power stability of the 486.1 nm output at the maximum power over 2 h.
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Table 1. Coatings of Mirrors
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