Abstract

We report a high-repetition-rate picosecond optical parametric oscillator (OPO) based on ${\mathrm{CdSiP}}_2$ (CSP) that is synchronously pumped by an Yb-fiber laser at 1064 nm and provides high average power in the deep-infrared (deep-IR) at 79.5 MHz. The OPO is tunable across 6205–6710 nm in the idler, providing as much as 105 mW of average power at 6205 nm and $>55\mathrm{mW}$ over nearly the entire tuning range. The deep-IR idler output exhibits passive power stability better than 2.3% rms over 12 h in good beam quality. The near-IR signal pulses from the OPO have a Gaussian pulse duration of $\sim 19\mathrm{ps}$, measured at 1284 nm. We have investigated the temperature tuning characteristics of the OPO and compared the data with the theoretical calculations using the most recent Sellmeier equations and thermo-optic coefficients for the crystal. To the best of our knowledge, this is the first picosecond OPO based on CSP operating at MHz repetition rates.

© 2017 Optical Society of America

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