Improvements in the capacity of computer-generated holographic storage using the Lee method with sparse multivalued reconstructions

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Abstract

The use of sparse multivalued data encodings for the purpose of increasing the capacity of parallel-access optical memories based on Fourier-transform computer-generated holography is discussed. Results based on the Lee method indicate that a sparse encoding of nonbinary data words can be used to increase the storage-area utilization efficiency from 35% to > 70%. It is also found that for signal-to-noise ratios greater than 200, five-level data encoding can be used to achieve bit error rates less than 10−12 reliably with 60% area efficiency.

Original languageEnglish (US)
Pages (from-to)1396-1400
Number of pages5
JournalApplied optics
Volume34
Issue number8
DOIs
StatePublished - Mar 1995

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Keywords

  • Capacity
  • Computer-generated holography
  • Optical memory

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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