TRANSVERSE-MODE SELECTION IN SINGLE-LONGITUDINAL MODE LASERS

In this paper we analyze the transverse pattern-forming characteristic s of a two-level and single-longitudinal-mode laser. The corrections t o the classical empty cavity modes due to pumping and losses are speci fically considered, leading to different excitation rates for the diff erent transverse modes. The near-threshold excitation rates provide a selection mechanism that is studied and compared to the results from n umerical simulations of the Maxwell-Bloch equations.