Abstract
An experimental method is described for determining the stimulated emission cross section σ of a gas laser. The method was used to measure σ for the 00°1–10°0 vibrational transition of the CO2 molecule in a compact waveguide laser having a beryllia ceramic discharge tube. The determination of σ was based on an experimental measurement of the luminescence drop at 4.3 μ wavelength, and of the laser output power at 10.6 μ wavelength. The value of σ0 measured at zero photon flux density in the waveguide resonator, for a gas mixture Xe–CO2–N2–He at a pressure of 6.65 kPa, was 1.84×10−18 cm2. The effective value of the upper active-level lifetime of the CO2 molecule was also determined.
Published Version
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