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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 28 — Oct. 1, 2009
  • pp: 5240–5250

Phase-image-based sparse-gray-level data pages for holographic data storage

Bhargab Das, Joby Joseph, and Kehar Singh  »View Author Affiliations


Applied Optics, Vol. 48, Issue 28, pp. 5240-5250 (2009)
http://dx.doi.org/10.1364/AO.48.005240


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Abstract

We propose a method for implementation of gray-scale sparse block modulation codes with a single spatial light modulator in phase mode for holographic data storage. Sparse data pages promise higher recording densities with reduced consumption of the dynamic range of the recording material and reduced interpixel cross talk. A balanced sparse-gray-level phase data page gives a homogenized Fourier spectrum that improves the interference efficiency between the signal and the reference beams. Construction rules for sparse three-gray-level phase data pages, readout methods, and interpixel cross talk are discussed extensively. We also explore theoretically the potential storage density improvement while using low-pass filtering and sparse-gray-level phase data pages for holographic storage, and demonstrate the trade-off between code rate, block length, and estimated capacity gain.

© 2009 Optical Society of America

OCIS Codes
(210.2860) Optical data storage : Holographic and volume memories
(210.4680) Optical data storage : Optical memories
(070.6120) Fourier optics and signal processing : Spatial light modulators

ToC Category:
Optical Data Storage

History
Original Manuscript: April 17, 2009
Revised Manuscript: August 9, 2009
Manuscript Accepted: August 19, 2009
Published: September 21, 2009

Citation
Bhargab Das, Joby Joseph, and Kehar Singh, "Phase-image-based sparse-gray-level data pages for holographic data storage," Appl. Opt. 48, 5240-5250 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-28-5240

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