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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/1366

Title: Phase-image-based content-addressable holographic data storage
Authors: John, Renu
Joseph, Joby
Singh, Kehar
Keywords: Volume holographic memories
Associative recall
Content-based search
Holographic data storage
Issue Date: 2004
Citation: Optics Communications, 232(1-6), 99-106
Abstract: 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 π 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.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/1366
Appears in Collections:Physics

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