15微焦皮秒空心光纤反馈光学参量振荡器

15-µJ picosecond hollow-core-fiber-feedback optical parametric oscillator.

作者信息

Wu Yudi, Fu Qiang, Liang Sijing, Poletti Francesco, Richardson David J, Xu Lin

出版信息

Opt Express. 2023 Jul 3;31(14):23419-23429. doi: 10.1364/OE.494037.

Abstract

We report a high-energy, picosecond, mid-infrared (MIR) optical parametric oscillator (OPO), in which a length of hollow-core-fiber (HCF) is employed to enable operation at 1-MHz repetition rate in a compact cavity format. The OPO is synchronously pumped by an ytterbium-doped-fiber (YDF) master-oscillator-power-amplifier (MOPA) system, seeded by a 1040-nm gain-switched laser diode (GSLD). Using periodically poled lithium niobate (PPLN) as the nonlinear crystal, the OPO generates signal and idler beams with tunable wavelengths in the range of 1329-1641 nm and 2841-4790 nm, respectively. The OPO provides 137-ps pulses with a maximum signal energy of 10.05 µJ at 1600 nm and a maximum idler energy of 5.13 µJ at 2967 nm. This, to the best of our knowledge, represents the highest energy MIR pulses, as well as the highest total converted pulse energy (15.18 µJ), ever achieved from a fiber laser pumped picosecond OPO.

摘要

我们报道了一种高能皮秒中红外（MIR）光学参量振荡器（OPO），其中采用了一段空芯光纤（HCF），以实现紧凑腔结构下1 MHz重复频率的运转。该OPO由掺镱光纤（YDF）主振荡器功率放大器（MOPA）系统同步泵浦，由一个1040 nm增益开关激光二极管（GSLD）种子注入。利用周期极化铌酸锂（PPLN）作为非线性晶体，该OPO分别产生波长可调谐在1329 - 1641 nm和2841 - 4790 nm范围内的信号光和闲频光。该OPO提供137 ps的脉冲，在1600 nm处最大信号能量为10.05 μJ，在2967 nm处最大闲频能量为5.13 μJ。据我们所知，这代表了从光纤激光泵浦皮秒OPO获得的最高能量的中红外脉冲，以及最高的总转换脉冲能量（15.18 μJ）。