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Proceedings Paper

Optical encrypted holographic memory using triple random phase-encoded multiplexing in photorefractive LiNbO3:Fe crystal
Author(s): Li-Chuan Tang; Guang Wei Hu; Kendra L. Russell; Chen Shiung Chang; Chi Ching Chang
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Paper Abstract

We propose a new holographic memory scheme based on random phase-encoded multiplexing in a photorefractive LiNbO3:Fe crystal. Experimental results show that rotating a diffuser placed as a random phase modulator in the path of the reference beam provides a simple yet effective method of increasing the holographic storage capabilities of the crystal. Combining this rotational multiplexing with angular multiplexing offers further advantages. Storage capabilities can be optimized by using a post-image random phase plate in the path of the object beam. The technique is applied to a triple phase-encoded optical security system that takes advantage of the high angular selectivity of the angular-rotational multiplexing components.

Paper Details

Date Published: 19 October 2000
PDF: 7 pages
Proc. SPIE 4110, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VI, (19 October 2000); doi: 10.1117/12.404790
Show Author Affiliations
Li-Chuan Tang, National Univ. of Defense and National Chiao Tung Univ. (Taiwan)
Guang Wei Hu, National Univ. of Defense (Taiwan)
Kendra L. Russell, Virginia Military Institute (United States)
Chen Shiung Chang, National Chiao Tung Univ. (Taiwan)
Chi Ching Chang, National Univ. of Defense (Taiwan)


Published in SPIE Proceedings Vol. 4110:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VI
Shizhuo Yin; Francis T. S. Yu, Editor(s)

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