We report traveling-wave optical parametric generation in short (2-mm) ZnGeP<sub>2</sub> samples with reduced anomalous absorption, using femtosecond pump pulses near 2 μm . The signal and the idler waves generated could be tuned from 2.5 to 10 μm , and they extend the tunability of the β-barium borate optical parametric generator used as a pump source to the mid-infrared. At a single-pass internal conversion efficiency of 2.5% we estimate pulse durations of 75 fs (signal near 3 μm) and 200 fs (idler near 6 μm).
© 1999 Optical Society of America
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
V. Petrov, F. Rotermund, F. Noack, and P. Schunemann, "Femtosecond parametric generation in ZnGeP2," Opt. Lett. 24, 414-416 (1999)