Abstract
The semiclassical theory of gas lasers has been reformulated by adding rate terms to the density-matrix component differential equations. The solution to these equations, in the form of a Fourier series, is applicable at high laser intensities. A calculation of the effect of phase-changing collisions is also included so that the results can be compared to experimental data taken with a He-Ne laser operating at a wavelength of 1.15 μm.

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