Effective dynamic range metric of photorefractive crystal for the speckle volume holographic memory

Peikun Zhang; Guofan Jin; Qingsheng He; Minxian Wu; Yingbai Yan; Fengtao Wang

doi:10.1117/12.404798

19 October 2000 Effective dynamic range metric of photorefractive crystal for the speckle volume holographic memory

Peikun Zhang, Guofan Jin, Qingsheng He, Minxian Wu, Yingbai Yan, Fengtao Wang

Proceedings Volume 4110, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VI; (2000) https://doi.org/10.1117/12.404798
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

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.

Citation Download Citation

Peikun Zhang, Guofan Jin, Qingsheng He, Minxian Wu, Yingbai Yan, and Fengtao Wang "Effective dynamic range metric of photorefractive crystal for the speckle volume holographic memory", Proc. SPIE 4110, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VI, (19 October 2000); https://doi.org/10.1117/12.404798

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