We report a high-power picosecond optical parametric oscillator (OPO) synchronously pumped by a Yb fiber laser at , providing of total average power in the near to mid-IR at 73% extraction efficiency. The OPO, based on a MgO:PPLN crystal, is pumped by pulses at and can simultaneously deliver of signal at and of idler at for of pump power. The oscillator has a threshold of , with maximum signal power of at and idler power of at at slope efficiencies of 51% and 31%, respectively. Wavelength coverage across (signal) and (idler) is obtained, with a total power of ~11 W and an extraction efficiency of ~68%, with pump depletion of ~78% maintained over most of the tuning range. The signal and idler output have a single-mode spatial profile and a peak-to-peak power stability of and over at the highest power, respectively. A signal pulse duration of with a clean single-peak spectrum results in a time-bandwidth product of ~1.72, more than four times below the input pump pulses.
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