Oscillatory Lasing Modes In a Coupled Circular Microcavity

We have numerically investigated oscillatory lasing modes in a coupled circular microcavity laser by solving the Schrodinger-Bloch equation with a nonlinear interaction between the light field and the lasing medium. Uniform pumping in the lasing process generates some special patterns as stationary ones, and the patterns are repeatedly shown during the lasing process. In this case, the patterns may be interpreted as linear combinations of the nearly degenerate modes in which the classical trajectory inside the cavity encounter the boundary of the cavity with a nearly critical angle. The numerical results are posted with a brief physical analysis.