25 GB read-only disk system using the two-dimensional equalizer

被引：14

作者：

Tomita, Y ^{[1
]}

Nishiwaki, H ^{[1
]}

Miyanabe, S ^{[1
]}

Kuribayashi, H ^{[1
]}

Yamamoto, K ^{[1
]}

Yokogawa, F ^{[1
]}

机构：

[1] Pioneer Corp, Corp R&D Labs, Tsuruga, Saitama 3502288, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 2001年 / 40卷 / 3B期

关键词：

optical disk; high-density recording; high NA; thin cover; two-dimensional equalizer; cross-talk cancel; adaptive equalizer; inter-symbol interference; signal-to-noise ratio; Viterbi decoder;

D O I：

10.1143/JJAP.40.1716

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In order to achieve a higher density disk system, we applied a two-dimensional equalizer along with a limit equalizer to an optical disk drive system which has an objective lens with a numerical aperture of 0.85 and a thin transparent cover layer of 0.1 mm thickness. Consequently we realized the 25GB read-only disk system with sufficient margins against disk tilt and defocus. The two-dimensional equalizer is composed of a cross-talk cancel system and a tangential adaptive equalizer, and could prevent deterioration due to inter-symbol interference and cross-talk from adjacent tracks. Using the limit equalizer could prevent deterioration due to disk noise. By measuring the jitter with the limit equalizer, which has an ability to expand the system margin almost equivalent to that of the Viterbi decoder. we could evaluate the disk quality for standardization and verification.

引用

页码：1716 / 1722

页数：7

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