论文部分内容阅读
一、前言 信息技术的发展对光存储系统容量和数据传输率提 出了越来越高的要求。传统光存储受到光学衍射极限的 限制,采用缩短激光波长和增大数值孔径的方法来提高 存储密度的空间非常有限。多阶光存储技术能够在不改 变光学数值孔径的情况下,利用先进的信号处理与编码 技术,显著提高存储容量和数据传输率,目前已经成为 国内外光存储研究的热点方向之一。
I. Introduction The development of information technology has raised higher and higher requirements on the capacity and data transmission rate of optical storage systems. Traditional optical storage is limited by the optical diffraction limit, and there is very limited space to increase the storage density by reducing the laser wavelength and increasing the numerical aperture. Multi-level optical storage technology can not only change the optical numerical aperture, but also make use of advanced signal processing and coding technology to significantly improve the storage capacity and data transmission rate. At present, it has become one of the hot spots in optical storage research at home and abroad.