Investigation of the output characteristic of a rotating ring gas laser

An analysis is made of a general expression for the output characteristic of a rotating ring gas laser. The results are given of an experimental investigation of the splitting of the normal frequencies of a rotating ring resonator containing a homogeneous dielectric medium. It is shown that the splitting is inversely proportional to the refractive index of the medium in the resonator. Methods for reducing the backscattering coupling between the opposite waves are considered. It is shown experimentally that a compensation method involving the use of return mirrors can reduce drastically the coupling between the opposite waves.