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Proceedings Paper

High-density read-only optical disk system using superresolution and an SHG green laser
Author(s): Masumi Ono; Koichi Yasuda; Atsushi Fukumoto; Masahiko Kaneko
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Paper Abstract

PSR (premastered optical disk by super-resolution) is a super-resolution technique used to increase the recording density of ROM optical disks. Our PSR system uses a novel disk with a nonlinear optical layer, a second-harmonic-generation green laser ((lambda) equals 532 nm), 0.52NA objective lens and eight-to-fourteen modulation coding. By using PSR, a high C/N ration of 51dB was obtained for a pit length of 0.2 micrometers which is beyond the conventional optical limit. Furthermore, we obtained a bit error rate of less than 10-5 for a linear density of 0.185 micrometers /bit and a track pitch of 0.8 micrometers , thus demonstrating the feasibility of our PSR system with six times the areal density compared to the current CD.

Paper Details

Date Published: 8 September 1995
PDF: 8 pages
Proc. SPIE 2514, Optical Data Storage '95, (8 September 1995); doi: 10.1117/12.218738
Show Author Affiliations
Masumi Ono, Sony Corp. (Japan)
Koichi Yasuda, Sony Corp. (Japan)
Atsushi Fukumoto, Sony Corp. (Japan)
Masahiko Kaneko, Sony Corp. (Japan)

Published in SPIE Proceedings Vol. 2514:
Optical Data Storage '95
Gordon R. Knight; Hiroshi Ooki; Yuan-Sheng Tyan, Editor(s)

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