Patent ID: 6826216
Filing Date: 2004-11-30
Classification: H01S

Abstract:
A semiconductor laser having a light guide between resonator end surfaces formed by end surfaces of an active layer, comprisinga substrate having a surface tilted to a [0-1-1] direction from a (100) plane and a semiconductor stack formed on said substrate and comprising the active layer having two types of Group III elements including at least indium (In) and Group V elements including phosphorus (P) and a cladding layer of a first conductivity and a cladding layer of a second conductivity provided above and below said active layer, respectively, wherein at least one step-like structure is provided on said substrate and said light guide is provided at an upper step side of said step-like structure so that a portion of said light guide not including said resonator end surfaces is positioned in a vicinity of said step-like structure and so that a distance between said resonator end surface portions of said light guide and said step-like structure become greater than a distance between said portion of said light guide not including said resonator end surfaces and said step-like structure.