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Applied Optics

Applied Optics


  • Vol. 39, Iss. 23 — Aug. 10, 2000
  • pp: 4160–4167

Performance analysis of phase-code multiplexed holographic memory

Kyu-Tae Kim, Byung-Chul Cho, Eun-Soo Kim, and Sang-Keun Gil  »View Author Affiliations

Applied Optics, Vol. 39, Issue 23, pp. 4160-4167 (2000)

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For analysis of effective phase-code multiplexing in a holographic memory system four types of phase code are generated and used as a reference beam. In computer simulations the size of the address beam is fixed at 32 × 32 pixels, and 0%, 5%, 10%, 15%, 20%, and 25% phase-error rates in a pixel are purposely added to the real phase values for consideration of the nonlinear phase-modulation characteristics of a practical spatial light modulator. Cross talk and signal-to-noise ratios (SNR’s) are comparatively analyzed for these phase codes by calculation of the autocorrelation and the cross correlation. The pseudorandom code (PSR) has the lowest cross-correlation mean value of 0.067 among the four types of phase code, which means that the SNR of the PSR is higher than with other phase codes. Also, the standard deviation of the PSR, indicating the degree of recalled data degradation, has the lowest value, at 0.0113.

© 2000 Optical Society of America

OCIS Codes
(210.0210) Optical data storage : Optical data storage
(210.2860) Optical data storage : Holographic and volume memories
(210.4590) Optical data storage : Optical disks
(210.4680) Optical data storage : Optical memories

Original Manuscript: October 28, 1999
Revised Manuscript: May 16, 2000
Published: August 10, 2000

Kyu-Tae Kim, Byung-Chul Cho, Eun-Soo Kim, and Sang-Keun Gil, "Performance analysis of phase-code multiplexed holographic memory," Appl. Opt. 39, 4160-4167 (2000)

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