Opt Lett. 2013 Dec 15;38(24):5349-52. doi: 10.1364/OL.38.005349.
We report a stable, high-power, picosecond optical parametric oscillator (OPO) at 160 MHz repetition rate synchronously pumped by a frequency-doubled mode-locked Yb-fiber laser at 532 nm and tunable in the near-infrared, across 874-1008 nm (signal) and 1126-1359 nm (idler). Using a 30-mm-long MgO:sPPLT crystal, the OPO provides average output power up to 780 mW in the signal at 918.58 nm and 600 mW in the idler at 1242 nm. The device operates stably over many days, even close to degeneracy, exhibiting passive long-term power stability better than 1.8% rms in the signal and 2.4% rms in the idler over 2.5 h at a temperature of 55°C. We investigate spectral and temporal characteristics of the signal pulses under different conditions and demonstrate cavity-length tuning enabled by the dispersion properties of MgO:sPPLT. The output signal pulses have a duration of 2.4 ps at 967 nm.
我们报告了一种稳定的、高功率的皮秒光参量振荡器（OPO），其重复率为 160 MHz，由 532 nm 的倍频锁模掺镱光纤激光器同步泵浦，可在近红外范围内调谐，覆盖 874-1008nm（信号）和 1126-1359nm（闲频）。使用 30mm 长的 MgO：sPPLT 晶体，OPO 在 918.58nm 的信号中提供高达 780mW 的平均输出功率，在 1242nm 的闲频中提供 600mW 的平均输出功率。该器件在许多天内稳定运行，即使接近简并，在 55°C 的温度下，信号的被动长期功率稳定性优于 1.8%rms，闲频的稳定性优于 2.4%rms，持续时间超过 2.5 小时。我们研究了不同条件下信号脉冲的光谱和时间特性，并展示了 MgO：sPPLT 的色散特性实现的腔长调谐。在 967nm 时，输出信号脉冲的持续时间为 2.4ps。
