Calculation of the gains for 0001–1000 transitions in the CO2 molecule and 1000–0110 transitions in the CS2 molecule under conditions of selective pumping mediated by N2 molecules

A theoretical study is reported of the possibility of simultaneous lasing as a result of two transitions corresponding to the wavelength of 10.6μ in the case of the CO₂ molecule and 38.3μ in the case of the CS₂ molecule when an N₂–CO₂–CS₂ mixture is pumped by transfer of energy from N₂ molecules excited in an electric discharge. The level populations and the gains are calculated for the vibrational transitions 00⁰1–10⁰0(CO₂) and 10⁰0–01¹0 (CS₂). The predicted gains are of the order of 0.1m^–1, indicating that two-wave lasing is possible.