Gain spectrum of a high-pressure CO2 laser

The gain spectrum of a high-pressure uv preionized CO2 laser was measured for pressures to 14 atm. The data show an ∼10% increase in the gain of the P branch of the 961-cm−1 (00°1) - (10°0)1 band which is attributed to the overlapping 927-cm−1 0111- (1110)1 band. The measured gain was shown to be in good agreement with the theoretical predictions of a four-temperature kinetic model.