Difference frequencies of CO and CO2 lasers when tuning phase-matching angle in AgGaSe2 crystal

A laser system emitting within the IR wavelength range from 12 to 16.6 micron is discussed. The hybrid laser system consists of molecular gas lasers with a frequency conversion in a nonlinear crystal. One gas laser is a carbon monoxide laser operating in multi-line or single-line mode. Another one is a carbon dioxide laser operating in multi-line mode. These lasers operate in a Q-switched mode. Spectrum formation at difference frequency generation of CO and CO
₂
lasers in AgGaSe
₂
crystal is studied experimentally and theoretically.