Patent ID: 6563851
Filing Date: 2003-05-13
Classification: B82Y,H01S

Abstract:
A laser diode, comprising:a substrate of a first conductivity type; a first cladding layer having said first conductivity type, said first cladding layer being formed over said substrate epitaxially; a first optical waveguide layer formed epitaxially over said first cladding layer; an active layer of a group III-V compound semiconductor material formed epitaxially over said first optical waveguide layer; a second optical waveguide layer formed epitaxially over said active layer; a second cladding layer having a second, opposite conductivity type, said second cladding layer being formed over said second optical waveguide layer epitaxially; a first electrode injecting first type carriers having a first polarity into said active layer; and a second electrode injecting second type carriers having a second, opposite polarity into said active layer, between said first optical waveguide layer and said active layer, there is provided an intermediate layer of a group III-V compound semiconductor material substantially free from Al and N in intimate contact with said active layer, said active layer having a composition of GaInNP containing therein N as a group V element.