Method and apparatus for reducing semiconductor laser optical noise

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United States of America Patent

PATENT NO 4532619
SERIAL NO

06460015

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Abstract

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A method and apparatus is disclosed for reducing optical noise in an optical information processing system having a single longitudinal mode laser which is converged on a record medium for detecting information stored on the medium. A range from 1-10% of the total emitted light per facet of the laser is fed back to an emitting point of the laser to minimize the occurrence of optical noise present in the light emitted from the laser.

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HITACHI LTD A CORP OF JAPAN6 KANDA SURUGADAI 4-CHOME CHIYODA-KU TOKYO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Suenaga, Hideo Toyokawa, JP 11 158
Sugiyama, Toshio Aichi, JP 33 402

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