基于计算机生成全息图的全息数据存储中球面波的移位复用。

Shift multiplexing with a spherical wave in holographic data storage based on a computer-generated hologram.

作者信息

Nobukawa Teruyoshi, Nomura Takanori

出版信息

Appl Opt. 2017 May 1;56(13):F31-F36. doi: 10.1364/AO.56.000F31.

DOI:10.1364/AO.56.000F31

Abstract

A holographic data storage system based on a computer-generated hologram (CGH) is simple and compact because a hologram of a data page is recorded through an imaging system without an additional optical path for a reference beam. In this paper, to improve the recording density of the holographic data storage based on a CGH, a shift multiplexing method using a spherical wave is proposed. A data page to be stored and a spherical wave are simultaneously reconstructed from a single CGH. This allows shift multiplexing by displacing a recording medium. Experimental results show that the proposed method can improve shift selectivity and enables us to implement shift multiplexing.

摘要

基于计算机生成全息图（CGH）的全息数据存储系统简单且紧凑，因为数据页的全息图是通过成像系统记录的，无需为参考光束设置额外的光路。在本文中，为了提高基于CGH的全息数据存储的记录密度，提出了一种使用球面波的移位复用方法。要存储的数据页和球面波从单个CGH中同时重建。这允许通过移动记录介质来实现移位复用。实验结果表明，所提出的方法可以提高移位选择性，并使我们能够实现移位复用。