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AssigneeNEC Corporation
InventorsKiichi Hamamoto, Jan De Merlier
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To provide a semiconductor laser diode and a semiconductor optical amplifier and an optical communication device incorporating the semiconductor laser diode or the semiconductor optical amplifier which enable low power consumption and high optical output. A semiconductor laser diode according to an embodiment of the present invention is a semiconductor laser diode 100 comprised of an active waveguide, the active waveguide including a first waveguide 11a that supplies a plurality of modes including a fundamental mode; and a second waveguide 12a that is wider than the first waveguide 11a and supplies a multimode, wherein the fundamental mode is provided as an oscillation light oscillated from the active waveguide.
A semiconductor laser diode comprising an active waveguide where a fundamental mode waveguide that supplies only a fundamental mode is not provided, the active waveguide comprising:
A semiconductor optical amplifier comprising an active waveguide where a fundamental mode waveguide that supplies only a fundamental mode is not provided, the active waveguide comprising:
Dependencies are inferred from the claim text.