Numerical study of optical injection dynamics of vertical-cavity surface-emitting lasers

We study numerically the transverse-mode dynamics of a vertical-cavity surface-emitting laser with external optical injection. We consider the case in which two transverse modes with parallel polarizations are exited. Varying the strength and frequency of the injected field, we find a rich variety of complex behaviors. We show that by increasing the optical injection strength the laser does not turn into a single-mode laser, as would be expected if the transverse modes have perpendicular polarizations.