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US 4,794,609 AGranted
Semiconductor laser provided with a plurality of lasers in the form of an array
AssigneeCanon Kabushiki Kaisha
InventorsToshitami Hara, Seiichi Miyazawa, Hidetoshi Nojiri, Akira Shimizu, Yoshinobu Sekiguchi, Isao Hakamada
Life of this patent
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Abstract
A semiconductor laser comprises a plurality of lasers provided in the form of an array, the lasers being monolithically formed, a plurality of photodetector elements being monolithically formed, a plurality of first separating portions for separating the lasers and the photodetector elements from each other, and at least one second separating portion for separating the plurality of lasers from one another and the plurality of photodetector elements from one another.
Claims9
A semiconductor laser device comprising:
- a plurality of lasers provided in the form of an array, said lasers being monolithically formed on a substrate, said substrate including electrodes and a resonant cavity;
- a plurality of photodetector elements corresponding to said plurality of lasers, said photodetector elements being monolithically formed;
- a plurality of first separating portions for separating said lasers and said photodetector elements from each other, each of said first separating portions being a groove in said device between each of said lasers and said photodetector elements corresponding thereto;
- and
- at least one second separating portion for separating said plurality of lasers from one another and said plurality of photodetector elements from one another, said second separating portion being a groove in said device between said lasers and between said photodetector elements, and wherein said groove of said second separating portion is deeper than said grooves of said first separating portion.
2 more elements
Dependencies are inferred from the claim text.