Frequency-selective stimulated emission from CO2 molecules in the 16 μ band

Calculations are reported of multistage frequency-selective stimulated emission of CO₂ molecules in the 9 μ band and of the R (11) line in the 16 μ band. It is shown that high-power and narrow-frequency stimulated emission can be obtained in the 16 μ band of CO₂ by pulsed Q switching of the resonator. The output power can be almost doubled by introducing into the resonator an external radiation pulse of the selected frequency (in the 16 μ band) synchronized with a 9-μ lasing pulse.