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Proceedings Paper

Interpixel grating noise in holographic memories
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Paper Abstract

We have experimentally discovered that the Signal-to-Noise Ratio (SNR) of holograms initially remains constant as the number of holograms stored increases and drops significantly only after a large number of holograms are recorded. This suggests that in a large-scale memory, the limiting noise source is not crosstalk between holograms but holographic noise due to the prolonged exposure of the signal beam. We have carried out experiments to investigate the formation and influence of the inter-pixel grating noise and shown that it is a very important form of holographic noise. We also proposed and demonstrated the use of random-phase modulation in the signal to suppress the inter-pixel grating noise.

Paper Details

Date Published: 5 November 1998
PDF: 12 pages
Proc. SPIE 3468, Advanced Optical Memories and Interfaces to Computer Storage, (5 November 1998); doi: 10.1117/12.330422
Show Author Affiliations
Xin An, California Institute of Technology (United States)
George Panotopoulos, California Institute of Technology (United States)
Demetri Psaltis, California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 3468:
Advanced Optical Memories and Interfaces to Computer Storage
Pericles A. Mitkas; Zameer U. Hasan, Editor(s)

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