Infrared pulses were generated over the range from 1.2 to 10 &mgr;m in a single path system consisting of two AgGaS2crystals. A high photon conversion efficiency between 10−1and 10−3was found depending upon the emission frequency. A bandwidth of approximately 10 cm−1for idler pulses between 6 and 10 &mgr;m was observed. With a Nd:yttrium aluminum garnet laser pump of 20‐ps pulse duration one observes parametric pulses of 8 ps.