DYNAMICS OF A RING LASER WITH DIFFUSION O F ACTIVE-CENTERS

A dynamic theory of a bidirectional ring laser with a slow-response ac tive medium is developed. This theory takes account of certain specifi c factors applicable to semiconductor and some solid-state active medi a, such as the diffusion of the light-emitting centres and nonisochron icity. These factors are shown to have a significant influence on the dynamic characteristics of a laser, because they change the conditions for a phase-sensitive interaction of counterpropagating waves in a po pulation inversion grating induced by these waves. In particular, thes e factors give rise to a range where stable bidirectional lasing with equal wave intensities is observed. They also complicate the dynamics of such a laser in the region of transient processes.