[en] The outputs of flash-lamp pumped rhodamine 6G and rhodamine B lasers have been mixed in a AgGaS2 crystal. The generated difference frequency radiation has been tuned from 8.7 to 11.6 μm. Measurements of laser-induced damage of AgGaS2 have been made in the region of 600 nm which show a rapid fall in threshold with decreasing wavelength. (U.S.)