National Institute of Information and Communications Technology, Incorporated

Kouichi Akahane

Atsushi Matsumoto

Naokatsu Yamamoto

A semiconductor optical deviceincludes an active layerprovided on a substratea clad layerprovided on the active layerand a contact layerprovided on the clad layerThe contact layercontains a first impurity and a second impurity different from the first impurity. A semiconductor light source includes the active layerprovided on the substratethe clad layerprovided on the active layerand the contact layerprovided on the clad layerThe contact layercontains the first impurity and the second impurity different from the first impurity.

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Tokyo, Japan

Kouichi Akahane