Patent ID: 6058124
Filing Date: 2000-05-02
Classification: H01S

Abstract:
A monolithic edge-emitting semiconductor laser structure comprising:a first laser structure havingan n-type first substrate;an n-type first cladding layer of a first semiconductor material formed on said substrate;a first confinement layer, a first active layer for emitting light of an infrared wavelength, and a second confinement layer forming a first active region on said first cladding layer;a p-type second cladding layer of a second semiconductor material formed on said second confinement layer above said first active region;a first ridge waveguide formed from said second cladding layer, said first ridge waveguide providing optical confinement for light emission from said first active region, said first ridge waveguide being defined by native oxide layers being formed from said second cladding layer;a p-type first contact layer formed on said second cladding layer,a second laser structure havingsaid n-type first substrate;an n-type third cladding layer of a third semiconductor material formed on said first substrate;a third confinement layer, a second active layer for emitting light of a red wavelength, and a fourth confinement layer forming a second active region on said third cladding layer;a p-type fourth cladding layer of said second semiconductor material formed on said fourth confinement layer above said second active region;a second ridge waveguide formed from said fourth cladding layer, said second ridge waveguide providing optical confinement for light emission from said second active region, said second ridge waveguide being defined by native oxide layers being formed from said fourth cladding layer;a p-type second contact layer formed on said fourth cladding layer,said first laser structure and said second laser structure being side by side on said first substrate,a first electrode and a second electrode which enable biasing of said first active region for emission of light of said infrared wavelength, anda third electrode and said second electrode which enable biasing of said second active region for emission of light of said red wavelength.