Injection laser with a stably scanning radiation pattern

A model of self-lateral-mode-locking in an injection laser with a parabolic inhomogeneity of the dielectric constant of the active medium is proposed. It is shown that an appropriate choice of the pump current profile provides a stable scan of the radiation pattern. The role of the antiwaveguide parameter in the violation of the scan stability is discussed in detail. The spectrum of lateral modes is shown to split with increasing this parameter. Subgroups of satellite modes appear inside each mode, which efficiently interact with each other, resulting in periodic violation and recovery of the scan periodicity.