We report the operation of an all-solid-state system for the generation of tunable mid-infrared sub-50-fs pulses. A Ti:sapphire regenerative amplifier, pumped by 10 W of power from 532-nm, diode-pumped, frequency-doubled Nd:YVO<sub>4</sub> lasers, produced 4-μJ energy, sub-50-fs pulses at 800 nm with a 100-kHz repetition rate. This output was used to drive a β-BaB<sub>2</sub>O<sub>4</sub> optical parametric amplifier followed by a difference-frequency generator based on a AgGaS<sub>2</sub> crystal. Continuous tuning of ultrafast pulses from 2.4m to longer than 12μm was obtained. A performance comparison of difference-frequency generation in type I and type II phase-matched AgGaS<sub>2</sub> is reported.
© 1998 Optical Society of America
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(320.7090) Ultrafast optics : Ultrafast lasers
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(320.7160) Ultrafast optics : Ultrafast technology
B. Golubovic and M. K. Reed, "All-solid-state generation of 100-kHz tunable mid-infrared 50-fs pulses in type I and type II AgGaS2," Opt. Lett. 23, 1760-1762 (1998)