Influence of resonance radiation trapping on the Zeeman effect in a ring laser

The results are reported of a theoretical and experimental investigation of the influence of resonance radiation trapping on the Zeeman effect in a ring laser. The experimentally observed strong dependence of the Zeeman beat frequency on the radiation intensity can be explained in a natural manner if allowance is made for the radiation trapping. This dependence provides a convenient means for determining the constants characterizing the influence of radiation trapping on the operation of gas lasers.