Experimental demonstration of gray-scale sparse modulation codes in volume holographic storage

Brian M. King, Geoffrey W. Burr, Mark A Neifeld

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We discuss experimental results of a versatile nonbinary modulation and channel code appropriate for two-dimensional page-oriented holographic memories. An enumerative permutation code is used to provide a modulation code that permits a simple maximum-likelihood detection scheme. Experimental results from the IBM Demon testbed are used to characterize the performance and feasibility of the proposed modulation and channel codes. A reverse coding technique is introduced to combat the effects of error propagation on the modulation-code performance. We find experimentally that level-3 pixels achieve the best practical results, offering an 11-35% improvement in capacity and a 12% increase in readout rate as compared with local binary thresholding techniques.

Original languageEnglish (US)
Pages (from-to)2546-2559
Number of pages14
JournalApplied Optics
Volume42
Issue number14
StatePublished - May 10 2003

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gray scale
Demonstrations
Modulation
modulation
Testbeds
combat
Maximum likelihood
permutations
Pixels
readout
coding
Data storage equipment
pixels
propagation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Experimental demonstration of gray-scale sparse modulation codes in volume holographic storage. / King, Brian M.; Burr, Geoffrey W.; Neifeld, Mark A.

In: Applied Optics, Vol. 42, No. 14, 10.05.2003, p. 2546-2559.

Research output: Contribution to journalArticle

King, Brian M. ; Burr, Geoffrey W. ; Neifeld, Mark A. / Experimental demonstration of gray-scale sparse modulation codes in volume holographic storage. In: Applied Optics. 2003 ; Vol. 42, No. 14. pp. 2546-2559.
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