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Spectral-hole-and-angle multiplexed volume holographic memory

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Abstract

Volume holographic data storage is an exciting research area due to the prospect of large storage density and fast access rate. In recent years, a new kind of storage media, the spectral hole burning material, has been proposed and investigated1-3. The storage of 2,000 high-resolution holograms in a single sample has been demonstrated by Kohler et. al. via spectral hole multiplexing swept frequency recording scheme.3 Spectral hole multiplexing is fundamentally different from angle multiplexing and wavelength multiplexing with conventional holographic materials where Bragg matching is the only method to select a particular hologram from all the holograms recorded in a common volume.4-6 In this paper, we demonstrate theoretically that spectral-hole multiplexing and Bragg-angle multiplexing can be used together for spectral hole burning materials. We find that the cross-talk-limited storage density can be significantly increased.

© 1996 Optical Society of America

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