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Proceedings Paper

Applications of diffuser for volume holographic memory and correlator
Author(s): Guofan Jin; Liangcai Cao; Qingsheng He
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Paper Abstract

Correlation selectivity of the speckle encoding method with a diffuser in the reference beam or the object beam for volume holographic storage system is analyzed. Unlike Bragg selectivity, correlation selectivity has no sidelobes and does not depend on the thickness of the recording medium. Thus the intrapage crosstalk can be greatly suppressed. For a volume holographic memory, the reference beam is modulated with the diffuser, which can sharpen the diffraction efficiency curve (versus the angular deviation). It helps increase the storage density and improve the quality of the reconstructions. For a volume holographic correlator, the signal beam is modulated with the diffuser, which can sharpen the correlation peak and suppress the correlation sidelobes. It helps improve the parallelism and accuracy of the holographic correlator. It is shown that the diffuser techniques are effective and feasible to improve the performance of the volume holographic storage and correlation system.

Paper Details

Date Published: 20 January 2006
PDF: 6 pages
Proc. SPIE 6027, ICO20: Optical Information Processing, 60270A (20 January 2006); doi: 10.1117/12.667715
Show Author Affiliations
Guofan Jin, Tsinghua Univ. (China)
Liangcai Cao, Tsinghua Univ. (China)
Qingsheng He, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 6027:
ICO20: Optical Information Processing
Yunlong Sheng; Songlin Zhuang; Yimo Zhang, Editor(s)

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