High-density recording systems using partial response maximum likelihood (PRML) with blue laser diode (LD)

被引:9
|
作者
Iwanaga, T [1 ]
Ohkubo, S [1 ]
Nakano, M [1 ]
Kubota, M [1 ]
Honma, H [1 ]
Ide, T [1 ]
Katayama, R [1 ]
机构
[1] NEC Corp Ltd, Multimedia Res Labs, Miyamae Ku, Kawasaki, Kanagawa 2168555, Japan
关键词
high-density recording; PRML; blue LD; 0.6mm substrate; NA0.65; 20GB; 0.1 mm cover layer; NA0.85; 35GB; fingerprint influence;
D O I
10.1143/JJAP.42.1042
中图分类号
O59 [应用物理学];
学科分类号
摘要
This paper describes our two newly developed high-density-recording systems, which consist of a 35 GB system and a 20 GB system using partial response maximum likelihood (PRML) with blue laser diode (LD), and their respective evaluation systems. The 20 GB system consists of a 0.6 mm substrate disk system (System #1) with a numerical aperture (NA) 0.65 objective lens. On the other hand, the 35 GB system consists of a 0.1 mm cover layer disk system (System #2) with a NA0.85 objective lens. Moreover, we considered the two advantages and disadvantages, and future technical progress. Consequently, we considered that System #1 is fit for personal computer (PC) applications, and System #2 is fit for video disk recorder applications, such as prolonged high definition (HD) video recording of broadcasting satellite (BS) digital broadcasting.
引用
收藏
页码:1042 / 1043
页数:2
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