[1] Zhang Y, Zuo Y, Li Z, et al. High energy mid-infrared laser pulse output from a BaGa₄Se₇ crystal-based optical parametric oscillator[J]. Optics Letters, 45, 4595-4598(2020).

[2] Willer U, Saraji M, Khorsandi A, et al. Near- and mid-infrared laser monitoring of industrial processes, environment and security applications[J]. Optics and Lasers in Engineering, 44, 699-710(2006).

[3] Tian Wenlong, Han Kang, Zhu Jiangfeng, . Research progress of 2-5 μm mid-IR femtosecond optical parametric oscillator (Invited)[J]. Infrared and Laser Engineering, 50, 20210350(2021).

[4] He Yang, Chen Fei, Wan Haohua, . Fiber-laser-pumped high-power mid-infrared optical parametric oscillator based on MgO: PPLN crystal[J]. High Power Laser and Particle Beams, 34, 17-21(2022).

[5] Bai Xiang, He Yang, Yu Deyang, . Miniaturized mid-infrared MgO: PPLN optical parametric oscillator with high beam quality[J]. Infrared and Laser Engineering, 49, 20190512(2020).

[6] Nie Kongkun, Ning Jian, Zhang Baitao, . Recent progress of optical-superlattice-based mid-infrared optical parametric oscillators[J]. Chinese Journal of Lasers, 48, 0501008(2021).

[7] Myers L, Eckardt R, Fejer M, et al. Quasi-phase-matched optical parametric oscillators in bulk periodically poled LiNbO₃[J]. Journal of the Optical Society of America B, 20, 2102-2116(1995).

[8] Charbonneau-Lefort M, Afeyan B, Fejer M. Optical parametric amplifiers using chirped quasi-phase-matching gratings Ⅰ : Practical design formulas[J]. Journal of the Optical Society of America B, 25, 463-480(2008).

[9] Parsa S, Kumar S, Nandy B, et al. Yb-fiber-pumped, high-beam-quality, idler-resonant mid-infrared picosecond optical parametric oscillator[J]. Optics Express, 27, 25436-25444(2019).

[10] Niu S, Aierken P, Ababaike M, et al. Widely tunable, high-energy, mid-infrared (2.2-4.8 μm) laser based on a multi-grating MgO: PPLN optical parametric oscillator[J]. Infrared Physics & Technology, 104, 103121(2020).

[11] Wang F, Nie H, Liu J, . Miniaturized widely tunable MgO: PPLN nanosecond optical parametric oscillator[J]. Chinese Journal of Lasers, 48, 0501015(2021).

[12] Wang K, Gao M, Yu S, et al. A compact and high efficiency intracavity OPO based on periodically poled lithium niobate[J]. Scientific Reports, 11, 5079(2021).

[13] Xiong B, Guo L, Hou W, et al. High-power, high-repetition-rate operation of a period-continuously-tunable optical parametric oscillator at 3.78-4.62 mum based on a fan-out periodically poled MgO-doped lithium niobate[J]. Laser Physics, 21, 362-366(2011).

[14] Kolker D B, Sherstov I V, Kostyukova N Yu, et al. Broadband mid-IR source based on a MgO: PPLN optical parametric oscillator[J]. Quantum Electronics, 49, 191-194(2019).

[15] Bae In-Ho, Lim Sun Do, Yoo Jae-Keun, et al. Development of a mid-infrared CW optical parametric oscillator based on fan-out grating MgO: PPLN pumped at 1064 nm[J]. Current Optics and Photonics, 3, 33-39(2019).

[16] Erushin E, Nyushkov B, Ivanenko A, et al. Tunable injection-seeded fan-out-PPLN optical parametric oscillator for high-sensitivity gas detection[J]. Laser Physics Letters, 18, 116201(2021).

[17] Jundt D. Temperature-dependent sellmeier equation for the index of refraction, n_e, in congruent lithium niobate[J]. Optics Letters, 22, 1553-1555(1997).