Abstract

Enhancement of the angular selectivity in a double random-phase encoded holographic memory by use of reference plane waves is presented. In the storage algorithm, the angular selectivity is improved with the effect of random-phase masks. We show that the angular selectivity achieved by this scheme is more sensitive than that for Bragg angle detuning in a 90° geometry. Both theoretical and experimental results are presented and analyzed.

© 2004 Optical Society of America

Secure holographic memory by double-random polarization encryption

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