Patent ID: 6920160
Filing Date: 2005-07-19
Classification: H01S

Abstract:
1. Laser resonator for semiconductor lasers having a waveguide layer for a laser mode to be amplified which extends between a substrate layer and a superstrate layer and which is limited at two oppositely situated sides in extension direction of the waveguide layer by a first and a second end facet as resonator end faces, the two end faces establishing the propagation direction of the laser mode to be amplified, wherein the laser resonator between the two end facets has a first phase structure adjacent to the first end facet and a second phase structure adjacent to the second end facet, which vary locally in the plane of the waveguide layer in such a manner that at least one predetermined lateral laser mode in the plane of the waveguide layer and perpendicular to its propagation direction is phase-conjugated during passage through respectively one of the two phase structures, reflection at the adjacent end facet and repeated passage through the same phase structure, and the phase structures being configured in such a manner that a predertermined lateral laser mode is phase-conjugated during passage through the phase structure, reflection at the adjacent end facet and repeated passage through the same phase structure, which mode has, in the intermediate region between the first and the second phase structure, a strongly non-periodic varying phase front in the plane of the waveguide layer and laterally relative to the wave propagation direction.