Patent ID: 7483463
Filing Date: 2009-01-27
Classification: B82Y,H01S

Abstract:
1. A ridge-waveguide semiconductor laser diode comprising: a substrate; a lower multi-layered semiconductor formed on the substrate; an active layer formed on the lower multi-layered semiconductor; an upper multi-layered semiconductor having a multi-layered semiconductor ridge portion and formed on the active layer, the ridge portion having an upper surface substantially parallel to layers of the upper multi-layered semiconductor and side surfaces transverse to the upper surface of the ridge portion and the layers of the upper multi-layered semiconductor, and the ridge portion including an upper cladding layer; an upper electrode formed on the upper multi-layered semiconductor; and an upper contact layer formed between the upper electrode and the upper cladding layer, the upper cladding layer including side surfaces respectively corresponding to the side surfaces of the ridge portion, and an upper surface within the ridge portion, wherein the upper electrode covers at least one of the side surfaces of the ridge portion transverse to the upper surface of the ridge portion and the layers of the upper multi-layered semiconductor, and is configured to inject current through the at least one side surface of the ridge portion, and wherein the upper contact layer is formed between the upper electrode and the side surfaces and the upper surface of the upper cladding layer.