Multilevel optical data recording methods on phase-change media

• 来源期刊: 中国物理(英文版)
• 关键词: multilevel optical data storage phase-change media
• 年，卷（期）: 2003,（11）
• 页码范围: 1241-1245
• 页数: 5页
• 语种: 英文

摘要

Multilevel data storage (ML) is a new method in the optical storage field, which is also a trend for improving the capability of future optical discs. This article introduces several ML methods based on phase-change media including pit depth modulation (PDM) and mark radial width modulation (MRWM). In addition, some disadvantages and advantages concerning the principle of these methods will be discussed. Finally, a new ML method will be advanced, through which the levels in one recording pit will be increased evidently.