04571650 is referenced by 14 patents and cites 3 patents.

An optical information storage system wherein information is read from a magneto-optical storage medium by indicating the storage medium with a first laser beam generated by a semiconductor laser and exploiting the self-coupling effect of the semiconductor laser in response to light reflected from the storage medium to generate a second laser beam. A Faraday rotator is disposed in an optical path along which the reflected light from the magneto-optical storage medium returns to the semiconductor laser and a polarization rotating angle of the Faraday rotator is selected so that the oscillating polarization plane of the semiconductor laser is changeable in dependence upon the perpendicular magnetization direction of the magneto-optical storage medium. A linear polarizer is interposed between the semiconductor laser and a photodetector to extract from the second laser beam at least one polarization component parallel or perpendicular to a junction plane of the semiconductor laser with the extracted component being detected by the photodetector.

Title
Magneto-optic information storage system utilizing a self-coupled laser
Application Number
6/529679
Publication Number
4571650
Application Date
September 6, 1983
Publication Date
February 18, 1986
Inventor
Hideo Fujiwara
Tokorozawa
JP
Toshio Niihara
Kokubunji
JP
Masahiro Ojima
Kokubunji
JP
Agent
Antonelli Terry & Wands
Assignee
Hitachi
JP
IPC
G11B 11/00
G11B 7/00
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