Abstract

We report traveling-wave optical parametric generation in short (2-mm) ZnGeP2 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

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