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Increase of efficiency of optical pumping of a broadband CO2 laser amplifier as a result of the use of a multicomponent active medium

The problem of the increase of the energy conversion efficiency of a broadband CO2 laser amplifier with optical pumping by the multi-frequency HF-laser radiation is considered. To improve the utilization of the pumping radiation and to broaden the amplifier bandwidth the use of a buffered with Xe mixture of the isotopomers of carbon dioxide and nitrous oxide as active medium is proposed. Experimentally and by calculation the coefficients of an unsaturated absorption of 14N16O, 12C16O2 and 13C16O2 were determined on 19 lines of the pulsed chemical HF-laser which concentrate up to 60% of its total output energy. The estimations show that the application of a three-component mixture of these molecular gases enables to increase up to 30% the coefficient of the utilization of the pumping radiation at aperture about 10 cm.