Patent ID: 6256330
Filing Date: 2001-07-03
Classification: H01S

Abstract:
A semiconductor laser apparatus, comprising:an optical waveguide for providing optical confinement in lateral and perpendicular directions, said optical waveguide including an active layer stacked in the perpendicular direction between first and second layers, said first layer including a dopant of one of n-type and p-type and said second layer including gain confining region doped the other of n-type and p-type and extending in the perpendicular direction, said optical waveguide capable of supporting one of a plurality of perpendicular modes and a plurality of lateral modes;contacts for providing current for the active layer; andwherein said gain confining region has a geometry which is substantially matched to an intensity profile of a selected one of said mode plurality, thereby providing a modal gain difference between the selected mode and the remainder of said mode plurality.