We demonstrate the generation of femtosecond mid-infrared pulses by direct difference-frequency mixing in a AgGaS<sub>2</sub> crystal of two intense pulses from a dual-wavelength oscillator that have been simultaneously amplified in a single regenerative amplifier. A pulse energy of as much as 1.6 <i>μ</i>J was achieved at wavelengths of 9–11 <i>μ</i>m.
© 2002 Optical Society of America
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3280) Lasers and laser optics : Laser amplifiers
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(320.7090) Ultrafast optics : Ultrafast lasers
J. Song, J. F. Xia, Z. Zhang, and D. Strickland, "Mid-infrared pulses generated from the mixing output of an amplified, dual-wavelength Ti:sapphire system," Opt. Lett. 27, 200-202 (2002)