Abstract
The small-signal gain, saturation intensity and volumetric output power of CO2–N2–He waveguide lasers have been analyzed theoretically by taking into account the wall de-excitation of excited CO2 molecules in both the (0001) and (0110) vibrational levels. The theoretical calculation has been performed on a BeO discharge tube in this analysis, and has shown that small-signal gain and volumetric output power have respective optimum tube radii with respect to the operational gas pressure. A new feature of saturation intensity that it is independent of the square of the gas pressure at low gas pressures and/or at small tube radii has been found. The theoretically calculated small-signal gain is in reasonable agreement with the experimental value found by Cohen.
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