Modeling of lasing at lines of the Q branch of the 02(0)0-01(1)0 band of CO2

Lasing in the 02(0)0-01(1)0 band of CO2 (wavelength, 16.2 microns) is investigated theoretically for the case of combined excitation by an electric discharge with 'dumping' emission in the band 00(0)1-02(0)0. It is shown that in CO2:N2:He mixtures with a low CO2 content, lasing at 16.2 microns can be achieved without the cooling of the active medium. It is calculated that in the case of lasing at the Q branch of the 02(0)0-01(1)0 band, continuous frequency tuning in the range 616-618 per cm can be obtained.