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Proceedings Paper

Optical memory using programmable pseudorandom codes
Author(s): Kyu-Tae Kim; Byung-Chul Cho; Eun-Soo Kim; Sang Keun Gil
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Paper Abstract

For analysis of an effective phase code multiplexing in a holographic memory system, the Hadamard matrix (HAM) and the pseudorandom phase code (PRC) are generated and used as a reference beam. In computer simulations, the size of the address beam is fixed to 32 X 32 pixels, and 0%, 5%, 10%, 15%, 20%, or 25% phase error rate in a pixel is purposely added to the real phase values in order to consider the nonlinear phase modulation characteristics of the practical spatial-light modulator. Crosstalks and signal-to-noise ratios (SNRs) are comparatively analyzed for these two phase codes by calculating the auto- and cross-correlation. The cross-correlation mean values of the PRC and the HAM are 0.067 and 0.139, respectively, which means that the SNR of the PRC is higher than the HAM.

Paper Details

Date Published: 13 July 2000
PDF: 7 pages
Proc. SPIE 4046, Advances in Optical Information Processing IX, (13 July 2000); doi: 10.1117/12.391944
Show Author Affiliations
Kyu-Tae Kim, Kwangwoon Univ. (South Korea)
Byung-Chul Cho, Kwangwoon Univ. (South Korea)
Eun-Soo Kim, Kwangwoon Univ. (South Korea)
Sang Keun Gil, Suwon Univ. (South Korea)


Published in SPIE Proceedings Vol. 4046:
Advances in Optical Information Processing IX
Dennis R. Pape, Editor(s)

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