| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor laser whose NFP can be rendered a stable and uniform shape. SOLUTION: A zonal ridge portion 24 is provided in the upper part of a semiconductor layer 20, and zonal protrusions 22A, extending in the extending direction of the ridge portion 24, are provided in the region corresponding to the ridge portion 24 in the semiconductor layer 20. As a result, since light emitted from an active layer 24 is guided by waveguide mechanisms, corresponding to refractive index distributions formed by the ridge portion 24 and the protrusions 22A, the interaction of both waveguide mechanisms of the ridge portion 24 and the protrusions 22A can stabilize lateral mode and suppress filament emission. COPYRIGHT: (C)2009,JPO&INPIT
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