Patent ID: 6385225
Filing Date: 2002-05-07
Classification: H01S

Abstract:
A window type semiconductor laser light emitting device comprisinga substrate having a major surface; a laminated structure allowing electric current to flow therethrough and including: a first clad layer formed over said major surface and having a first area and second areas on both sides of said first area and closer to said major surface than said first area, an active layer formed on said first area of said first clad layer and generating laser light from said electric current, a second clad layer formed on said active layer and forming a resonator together with said active layer and a part of said first clad layer having said first area, and a third clad layer formed over said second clad layer and having side portions laterally projecting from both sides of said second clad layer; and buried window layers formed of a first compound semiconductor material having large resistivity against said electric current on said second areas and under said side portions of said third clad layer and transparent to said laser light for providing window regions contiguous to said resonator, said buried window layers having upper surfaces substantially coplanar with an upper surface of said second clad layer, a difference between said upper surfaces of said buried window layers and said upper surface of said second clad layer being equal to or less than 0.1 micron.