Extended reference method for cross-talk noise reduction in photorefractive holographic data storage

Foster F. Dai; Claire Gu

doi:10.1117/12.255468

25 October 1996 Extended reference method for cross-talk noise reduction in photorefractive holographic data storage

Foster F. Dai, Claire Gu

Proceedings Volume 2849, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications II; (1996) https://doi.org/10.1117/12.255468
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

For reducing the cross-talk noise and improving the storage capacity in angle-multiplexed volume holographic memories, a novel recording method is proposed. The technique employs a recording reference extending uniformly within a narrow spatial frequency bandwidth and reads the memory with a plane wave. Comparing to the conventional recording method with planar reference waves, the analytical results show that the signal-to-noise ratio obtained by using the extended reference method is about 20 dB higher. Moreover, a statistical analysis of the interpixel cross-talk noise is presented and the noise-to-signal ratio is given in a closed-form for both point reference method and extended reference method. Considering both interpage and interpixel cross-talk limited storage density. The results show that the proposed extended reference method achieves about 10 times larger storage density than the point reference method.

Citation Download Citation

Foster F. Dai and Claire Gu "Extended reference method for cross-talk noise reduction in photorefractive holographic data storage", Proc. SPIE 2849, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications II, (25 October 1996); https://doi.org/10.1117/12.255468

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KEYWORDS

Signal to noise ratio

Holography

Holograms

Volume holography

Data storage

Multiplexing

Denoising

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