Patent ID: 6925103
Filing Date: 2005-08-02
Classification: B82Y,H01S

Abstract:
1. A semiconductor light-emitting device, comprising: a multiple quantum well active layer amplifying an optical beam in response to injection of an electric current; a pair of cladding layers sandwiching said multiple quantum well active layer vertically from above and below for confining said optical beam in said multiple quantum well active layer; and an electrode for injecting said electric current into said multiple quantum well active layer, said multiple quantum well active layer including a plurality of gain regions aligned in a direction of propagation of said optical beam and repeated periodically, each of said gain regions having a multiple quantum well structure, a plurality of buried layers, each filling a gap between a pair of adjacent gain regions of said plurality of gain regions, each of said buried layers comprising a plurality of high-refractive index layers end a plurality of low-refractive index layers, each of said high-refractive index layers comprising a first semiconductor material having a first bandgap and each of said plurality of low-refractive index layers comprising a second semiconductor material having a second, larger bandgap.