SEMICONDUCTOR LASER DEVICE, OPTICAL DISK DEVICE, AND OPTICAL INTEGRATED DEVICE

摘要

PROBLEM TO BE SOLVED: To surely reduce noises, especially optical noises emitted from a nitride semiconductor laser device. SOLUTION: A nitride semiconductor laser device 1A is mounted with an element forming surface which is mounted facing to the top surface of a sub- mount 2 formed of insulating silicon carbide. An n-type InxGa1-xN spontaneous emission light-absorbing layer 15A having an energy gap which absorbs a spontaneous emission light emitted from an active layer, an n-type AlGaN clad layer 16 formed of n-type AlGaN for confinement of light which is generated in the active layer and also confinement of electrodes in the active layer, and an InyGa1-yN (0