The efficient power operation in a chemical oxygen-iodine laser for subsonic and supersonic modes has been demonstrated. It is shown that the substitution of the buffer gas N2 by CO2 does not cause any significant variation in the dependence of the output power on the degree of dilution of the active medium. The maximum power was 581W for the flow rate of molecular chlorine 22mMols that corresponds to a chemical efficiency of ηchem=29%.

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