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Proceedings Paper

Integrated-optic disc pickups
Author(s): Hiroshi Nishihara; Toshiaki Suhara; Shogo Ura
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Paper Abstract

The present status of waveguide-type integrated-optic disc pickups are reviewed. The authors have proposed and fabricated several types, and have demonstrated their fundamental functions. For the ROM pickup, they successfully reduced the focused spot to a diameter that is slightly larger than the diffraction-limited value, and confirmed capability of the focusing/tracking error signal detection. The pickup was extended to that for magneto-optical (MO) disc system, and the MO pickup was found experimentally to detect a polarization rotation as small as one contained in the signal beam reflected from MO medium. The pickup for parallel-data cards was also fabricated with photodiode array, and seven-track parallel readout was demonstrated. It was found by theoretical analysis that the waveguide-FGC combined type pickup has the possibility of super-resolution readout.

Paper Details

Date Published: 13 August 1992
PDF: 11 pages
Proc. SPIE 1663, Optical Data Storage, (13 August 1992); doi: 10.1117/12.137576
Show Author Affiliations
Hiroshi Nishihara, Osaka Univ. (Japan)
Toshiaki Suhara, Osaka Univ. (Japan)
Shogo Ura, Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 1663:
Optical Data Storage
Donald B. Carlin; David B. Kay; Alfred A. Franken, Editor(s)

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