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Proceedings Paper

High-density SHG laser readout with Pt/Co MO disk
Author(s): Masahiko Takahashi; Junko Nakamura; Masahiro Ojima; Kimio Tatsuno
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Paper Abstract

To increase the recording bit density of a magneto-optical disk using a shorter-wavelength laser, readout characteristics of disks with Pt/Co multilayered films were investigated by using a 532 nm SHG laser. The experiment using a (lambda) /4 - (lambda) /2 plate differential detection system showed that the disk noise of the Pt/Co disk was caused by a fluctuation of Kerr rotation angle, and that this noise component was reduced by sputter etching the surface of a SiN under-layer. A C/N ratio greater than 40 dB with a 0.45 micrometers domain length was obtained from this noise-suppressed Pt/Co disk.

Paper Details

Date Published: 13 August 1992
PDF: 7 pages
Proc. SPIE 1663, Optical Data Storage, (13 August 1992); doi: 10.1117/12.137549
Show Author Affiliations
Masahiko Takahashi, Hitachi Ltd. (Japan)
Junko Nakamura, Hitachi Ltd. (Japan)
Masahiro Ojima, Hitachi Ltd. (Japan)
Kimio Tatsuno, Hitachi Ltd. (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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