Meng Xianghao, Wang Zhaohua, Tian Wenlong, He Huijun, Fang Shaobo, Wei Zhiyi
Opt Lett. 2018 Feb 15;43(4):943-946. doi: 10.1364/OL.43.000943.
A high-power, high-repetition-rate, broadband tunable femtosecond optical parametric oscillator (OPO) is constructed based on KTiOAsO crystal, pumped by a 75.5 MHz mode-locked Yb:KGW laser. With 7 W pump power, the OPO generates as much as 2.32 W of signal power at 1.55 μm and 1.31 W of idler power at 3.05 μm, corresponding to a total conversion efficiency of 51.8%. Operating at 151 MHz repetition rate, the wavelength of the signal covers 1.41-1.71 μm with a tunable idler range of 2.61-3.84 μm. The idler bandwidth is more than 180 nm over the entire mid-infrared range. By compensating intracavity dispersion, the signal pulse has a nearly Fourier transform-limited duration of 129 fs at 1.52 μm.
基于KTiOAsO晶体构建了一种高功率、高重复频率、宽带可调谐飞秒光参量振荡器（OPO），由75.5 MHz锁模Yb:KGW激光器泵浦。在7 W泵浦功率下，该OPO在1.55μm处产生高达2.32 W的信号功率，在3.05μm处产生1.31 W的闲频光功率，总转换效率为51.8%。以151 MHz重复频率运行时，信号波长覆盖1.41 - 1.71μm，闲频光可调谐范围为2.61 - 3.84μm。在整个中红外范围内，闲频光带宽超过180 nm。通过补偿腔内色散，信号脉冲在1.52μm处具有近傅里叶变换极限的129 fs持续时间。
