Rotational temperature, inversion density and absolute population density for the CO2 (0002) sequence band laser

Accurate values of the physical parameters such as rotational temperature, inversion density, absolute population density in the regular and (0002) sequence bands of the CO2 laser have been determined. Those parameters characterize the lasing processes and interference between both bands. The dependences of the parameters on the partial pressures of foreign gas and the effects of foreign gas are also examined. It is confirmed that the rotational temperature is always well defined in any vibrational state. However, they are not necessarily equal to each other and to the translational temperature.