We demonstrate difference-frequency generation in the 6.8–12.5-μm range by mixing two high-power single-frequency laser diodes in a type II AgGaS<sub>2</sub> crystal. This compact all-solid-state scheme provides maximum output powers that exceed 1 μW and permits continuous adjustment-free scans larger than 2 cm<sup>−1</sup> across the entire tuning range.
© 1998 Optical Society of America
(140.0140) Lasers and laser optics : Lasers and laser optics
(190.1900) Nonlinear optics : Diagnostic applications of nonlinear optics
(190.2620) Nonlinear optics : Harmonic generation and mixing
Valentin Petrov, Christian Rempel, Klaus-Peter Stolberg, and Wolfgang Schade, "Widely Tunable Continuous-Wave Mid-Infrared Laser Source Based on Difference-Frequency Generation in AgGaS2," Appl. Opt. 37, 4925-4928 (1998)