Method of calculating the populations and excitation rates of the working levels of CO2 lasers

Existing methods of quantitative analysis of elementary processes in active molecular systems do not provide sufficient accuracy. The concentrations of molecules in the excited states are usually determined with an accuracy of up to an order. This is natural, since the determination is carried out using rough data on ne, Te, or, etc. On the other hand, if data is available on the generation power, the gain, and the intensity of spontaneous emission from the upper working level, one can obtain more exact values of the populations of the excited levels. This is of special interest for the CO 2 +He +N 2 system, since it has unique energy characteristics. Witteman in [3] estimated the inverse population of the 00~ and i0~ levels from the condition for cutoff of oscillations and the calculated probability of the rotational transition of the P-branch of the 00~176 band. Then he determined its population from the calculated value of the lifetime of the i0~ level.