TILTED AND STANDING WAVES AND VORTEX LATTICES IN CLASS-A LASERS

The tilted-wave solutions of the laser Ginzburg-Landau equation which describes the dynamics of class-A lasers are investigated. The excitat ion of tilted waves is shown to result in standing-waves patterns in t he form of stripes and/or of vortex lattices. The most stable structur e is a tilted wave, the square vortex lattice is less stable in unboun ded space. The stripe-structure and square vortex lattices in real las ers are predominantly due to lateral boundaries. The laser parameters for spatially symmetric lattices and for nonsymmetric structures domin ated by tilted waves are determined.