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Proceedings Paper

Effective dynamic range metric of photorefractive crystal for the speckle volume holographic memory
Author(s): Peikun Zhang; Guofan Jin; Qingsheng He; Minxian Wu; Yingbai Yan; Fengtao Wang
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Paper Abstract

The volume holographic memory in the photorefractive crystal is considered to be an efficient approach for high throughput data storage and retrieval. Among different techniques for data multiplexing, the hologram with speckle reference beam is a potential approach for high-density holographic information storage. However the existing research are mainly focused on the selective properties of volume holograms with speckle reference beam rather than on the capacity of data storage. So it is necessary to analyze the diffraction efficiency of speckle holograms that can be measured by dynamic range metric of storage medium. In this paper, an analytical expression of the effective dynamic range metric of storage medium for speckle volume holographic memory is derived. The effective grating modulation ratio is considered in the dynamic range metric owing to the appearance of speckle. The variation relationship of grating modulation ratio with speckle characteristics is described theoretically. The influences of speckle characteristics on the dynamic range performance are discussed by use of the numerical simulation.

Paper Details

Date Published: 19 October 2000
PDF: 6 pages
Proc. SPIE 4110, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VI, (19 October 2000); doi: 10.1117/12.404798
Show Author Affiliations
Peikun Zhang, Tsinghua Univ. (United States)
Guofan Jin, Tsinghua Univ. (China)
Qingsheng He, Tsinghua Univ. (China)
Minxian Wu, Tsinghua Univ. (China)
Yingbai Yan, Tsinghua Univ. (China)
Fengtao Wang, Tsinghua Univ. (China)

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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