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Proceedings Paper

Phase-change optical disc of 20-GB capacity using NRZI+, Turbo coding with blue laser
Author(s): Takanori Kishida; Toshitaka Kuma; Kenji Asano; Satoshi Sumi; Shuichi Ichiura
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Paper Abstract

Recently, there has been much research on high-density recording of phase change optical disc using blue laser. In most research, RLL (Run Length Limited) modulation such as (1,7) RLL and EFM (Eight to Fourteen Modulation) modulation is used for high-density recording and channel clock regenerating. NRZI (Non Return to Zero Inverse) modulation has a wider window width than other modulation methods. This is a superior characteristic for achieving a high-density recording system of optical disc. We introduced NRZI+ modulation to suppress the low frequency components. And we obtained a result of a bER (bit Error Rate) of less than 1×10-4 at a bit length of 0.13μm using Turbo coding with an objective lens of NA 0.7 and a blue laser of 405 nm wavelength. This result shows that a recording capacity of 20 GB is feasible using NRZI modulation.

Paper Details

Date Published: 16 September 2003
PDF: 6 pages
Proc. SPIE 5069, Optical Data Storage 2003, (16 September 2003); doi: 10.1117/12.532424
Show Author Affiliations
Takanori Kishida, Sanyo Electric Co., Ltd. (Japan)
Toshitaka Kuma, Sanyo Electric Co., Ltd. (Japan)
Kenji Asano, Sanyo Electric Co., Ltd. (Japan)
Satoshi Sumi, Sanyo Electric Co., Ltd. (Japan)
Shuichi Ichiura, Sanyo Electric Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 5069:
Optical Data Storage 2003
Michael O'Neill; Naoyasu Miyagawa, Editor(s)

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