## Abstract

We report a high-power picosecond optical parametric oscillator (OPO) synchronously pumped by a Yb fiber laser at $1.064\text{}\mathrm{\mu m}$, providing $11.7\text{}\mathrm{W}$ of total average power in the near to mid-IR at 73% extraction efficiency. The OPO, based on a $50\text{}\mathrm{mm}$ MgO:PPLN crystal, is pumped by $20.8\text{}\mathrm{ps}$ pulses at $81.1\text{}\mathrm{MHz}$ and can simultaneously deliver $7.1\text{}\mathrm{W}$ of signal at $1.56\text{}\mathrm{\mu m}$ and $4.6\text{}\mathrm{W}$ of idler at $3.33\text{}\mathrm{\mu m}$ for $16\text{}\mathrm{W}$ of pump power. The oscillator has a threshold of $740\text{}\mathrm{mW}$, with maximum signal power of $7.4\text{}\mathrm{W}$ at $1.47\text{}\mathrm{\mu m}$ and idler power of $4.9\text{}\mathrm{W}$ at $3.08\text{}\mathrm{\mu m}$ at slope efficiencies of 51% and 31%, respectively. Wavelength coverage across $1.43\u20131.63\text{}\mathrm{\mu m}$ (signal) and $4.16\u20133.06\text{}\mathrm{\mu m}$ (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 $\pm 1.8\%$ and $\pm 2.9\%$ over $1\text{}\mathrm{h}$ at the highest power, respectively. A signal pulse duration of $17.3\text{}\mathrm{ps}$ with a clean single-peak spectrum results in a time-bandwidth product of ~1.72, more than four times below the input pump pulses.

© 2010 Optical Society of America

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