Semiconductor laser array device
AssigneeSharp Kabushiki Kaisha
InventorsMototaka Taneya, Mitsuhiro Matsumoto, Sadayoshi Matsui, Hiroyuki Hosoba
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Abstract
A semiconductor laser array device comprising a substrate with a plurality of grooves and an active layer disposed over the substrate, resulting in optical waveguides within the active layer corresponding to the grooves, wherein the grooves are disposed over the entire area of the substrate and a means for preventing the injection of current into some of the grooves that are positioned outside of the central area of the substrate is disposed whereby the other grooves positioned in the central area of the substrate consitute a laser array portion of the semiconductor laser array device.
Claims17
In a semiconductor laser array device comprising a substrate with a plurality of grooves some of which extend from facet to facet within a central area and an active layer disposed over said substrate, resulting in optical waveguides within said active layer corresponding to said grooves, the device wherein said grooves are disposed within the central area and outside the central area of said substrate, causing the surface of said active layer to be flat and uniform over the entire area thereof, and a means for preventing the injection of current into some of said grooves that are positioned outside of the central area of said substrate is disposed, said current injection prevention means extending from facet to facet, whereby no grooves positioned outside of the central area of said substrate contribute to laser oscillation and the other grooves positioned in the central area of said substrate constitute a laser array portion of said semiconductor laser array device.
Dependencies are inferred from the claim text.