Patent ID: 6044098
Filing Date: 2000-03-28
Classification: H01S

Abstract:
A ridge waveguide semiconductor laser comprising:a substrate;an n-type Al.sub.0.5 In.sub.0.5 P first cladding layer formed on said substrate;an undoped Al.sub.0.4 Ga.sub.0.6 As first confinement layer, a GaAs active layer, and an undoped Al.sub.0.4 Ga.sub.0.6 As second confinement layer forming an active region on said first cladding layer;a ridge waveguide formed from a p-type Al.sub.0.5 In.sub.0.5 P second cladding layer formed above said active region, said ridge waveguide providing optical confinement for light emission from said active region, said ridge waveguide being defined by native oxide layers formed in grooves, said native oxide layers being formed from said second cladding layer and said active region; andfirst and second electrodes which enable biasing of said active region.