[1] M Ghotbi, A Esteban-Martin, M Ebrahim-Zadeh. Tunable high-repetition-rate femtosecond pulse generation in the ultraviolet[J]. Optics Letters, 2008, 33(4): 345-347.

[2] Tong Hui, Xie Guoqiang, Qiao Zhen. Generation of a mid-infrared femtosecond vortex beam from an optical parametric oscillator[J]. Optics Letters, 2020, 45(4): 989-992.

[3] Maidment L, Schunemann P G, Reid D T. Molecular fingerprint-region spectroscopy from 5 to 12 μm using an orientation-patterned gallium phosphide optical parametric oscillator[J]. Optics Letters, 2016, 41(18): 4261-4264.

[4] Popien S, Beutler M, Rimke I. Femtosecond Yb-fiber laser synchronously pumped HgGa₂S₄ optical parametric oscillator tunable in the 4.4- to 12-μm range[J]. Optical Engineering, 2018, 57(11): 111802.

[5] Qin Zhipeng, Xie Guoqiang, Ge Weiyang. Over 20-W mid-infrared picosecond optical parametric oscillator[J]. IEEE Photonics Journal, 2015, 7(5): 140056.

[6] Peng Y F, Wei X B, Xie G. A high-power narrow-linewidth optical parametric oscillator based on PPMgLN[J]. Laser Physics, 2013, 23(5): 055405.

[7] Descloux D, Walter G, Cadiou E. Wide and fast dispersion tuning of a picosecond OPO based on aperiodic quasi-phase matching using an axially chirped volume Bragg grating[J]. Optics Letters, 2016, 41(17): 4060-4063.

[8] Laporte C, Dherbecourt J-B, Melkonian J-M. Analysis of cavity-length detuning in diffraction-grating narrowed picosecond optical parametric oscillators[J]. Journal of the Optical Society of America B, 2014, 31(5): 1026-1034.

[9] Bhupathiraju K V, Rowley J D, Ganikhanova F. Efficient picosecond optical parametric oscillator based on periodically poled lithium tantalite[J]. Applied Physics Letters, 2009, 95(8): 081111.

[10] Zhu Jiangfeng, Zhong Xin, Teng Hao. Synchronously pumped femtosecond optical parametric oscillator based on MgO-doped periodically poled LiNbO₃[J]. Chinese Physics Letters, 2007, 24(9): 2603-2605.