Abstract
An analysis is made of nonlinear interactions of arbitrarily polarized traveling waves in a double-mode ring gas laser with a two-isotope active medium (the isotope concentrations are assumed to be equal). A weak longitudinal magnetic field is assumed to be applied to the active medium. Derivations are given of the dependences of the interaction coefficients of the waves on the total angular momenta of the active levels, weak magnetic field, longitudinal dimensions and relative positions of tubes with the active medium, and positions of modes in the gain profile. It is shown that the interaction coefficients of opposite waves in the two-isotope case are η2=(γab/ku)2 (η21) times smaller than in the one-isotope case. However, the interaction coefficients of the waves traveling in the same direction in a two-isotope gas medium are of the same order of magnitude as the corresponding coefficients for a one-isotope medium.
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