Optical memory using programmable pseudorandom codes

Kyu-Tae Kim; Byung-Chul Cho; Eun-Soo Kim; Sang Keun Gil

doi:10.1117/12.391944

13 July 2000 Optical memory using programmable pseudorandom codes

Kyu-Tae Kim, Byung-Chul Cho, Eun-Soo Kim, Sang Keun Gil

Author Affiliations +

Proceedings Volume 4046, Advances in Optical Information Processing IX; (2000) https://doi.org/10.1117/12.391944
Event: AeroSense 2000, 2000, Orlando, FL, United States

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.

Citation Download Citation

Kyu-Tae Kim, Byung-Chul Cho, Eun-Soo Kim, and Sang Keun Gil "Optical memory using programmable pseudorandom codes", Proc. SPIE 4046, Advances in Optical Information Processing IX, (13 July 2000); https://doi.org/10.1117/12.391944

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