Phase-image-based content-addressable holographic data storage

被引:13
作者
John, R [1 ]
Joseph, J [1 ]
Singh, K [1 ]
机构
[1] Indian Inst Technol, Dept Phys, Photon Grp, New Delhi 110016, India
关键词
volume holographic memories; associative recall; content-based search; holographic data storage;
D O I
10.1016/j.optcom.2003.12.065
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We propose and demonstrate the use of phase images for content-addressable holographic data storage. Use of binary phase-based data pages with 0 and pi phase changes, produces uniform spectral distribution at the Fourier plane. The absence of strong DC component at the Fourier plane and more intensity of higher order spatial frequencies facilitate better recording of higher spatial frequencies, and improves the discrimination capability of the content-addressable memory. This improves the results of the associative recall in a holographic memory system, and can give low number of false hits even for small search arguments. The phase-modulated pixels also provide an opportunity of subtraction among data pixels leading to better discrimination between similar data pages. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:99 / 106
页数:8
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