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Proceedings Paper

Random modulation in high-density holographic data storage and correlation recognition system
Author(s): Guofan Jin; Liangcai Cao; Qingsheng He; Haoyun Wei; Minxian Wu
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Paper Abstract

In the holographic data storage system, a shifting diffuser is employed in the reference beam to realize dynamic speckle multiplexing, while another vibrating diffuser is placed in the object beam to realize speckle modulation. These two methods can enlarge the storage capacity with high signal-to-noise rate. Speckle multiplexing can suppress the crosstalk due to multiple longitudinal modes of the small DPL laser. And speckle modulation in volume holographic correlators can suppress the diffraction sidelobes of output correlation signal along both vertical and horizontal direction. Another advantage of the speckle multiplexing and the speckle modulation is that the angular selectivity and the correlation peak are not sensitive to the thickness of the hologram. Finally a demonstration platform of compact holographic storage and correlation recognition system is briefly introduced in this paper.

Paper Details

Date Published: 21 October 2003
PDF: 10 pages
Proc. SPIE 5206, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IX, (21 October 2003); doi: 10.1117/12.505137
Show Author Affiliations
Guofan Jin, Tsinghua Univ. (China)
Liangcai Cao, Tsinghua Univ. (China)
Qingsheng He, Tsinghua Univ. (China)
Haoyun Wei, Tsinghua Univ. (China)
Minxian Wu, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 5206:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IX
Francis T. S. Yu; Ruyan Guo; Shizhuo Yin, Editor(s)

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