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Fiber-laser-based green-pumped picosecond MgO:sPPLT optical parametric oscillator

机译:基于光纤激光器的绿泵浦皮秒MgO:sPPLT光学参量振荡器

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摘要

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℃. 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.
机译:我们报告了一个稳定的,高功率的皮秒光学参量振荡器(OPO),其重复频率为160 MHz,由532 nm的倍频锁模Yb光纤激光器同步泵浦,并且可在874-1008范围内在近红外范围内进行调谐nm(信号)和1126-1359 nm(惰轮)。 OPO使用30mm长的MgO:sPPLT晶体,在918.58 nm处的信号中提供高达780 mW的平均输出功率,在1242 nm处的惰轮中提供高达600 mW的平均输出功率。该器件可在数天之内稳定运行,甚至接近简并状态,在55℃的温度下2.5小时内,其无源长期功率稳定性优于信号的rms有效值和惰轮的2.4%rms。我们研究了在不同条件下信号脉冲的频谱和时间特性,并演示了由MgO:sPPLT的色散特性实现的腔长调谐。输出信号脉冲在967 nm处的持续时间为2.4 ps。

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