Study on mechanisms for enhancement kinetics of lasing gases in an optimized sealed-off CO2 laser

The kinetics of gases (CO2, N-2 and He) in an optimized sealed-off CO2 laser are discussed in details. A comparison of numerical results shows that the population of the laser levels is increased by optimizing the lasing gases, with the increase of an excited N-2 impacting to the upper laser level. Also, decreasing the electron momentum transition frequency and increasing discharge current result in the increase of the relaxation of the upper rotational laser levels and the decrease of the level lifetime, thus the lasing saturation intensity in a resonator is increased finally.