Experimental evaluation of user capacity in holographic data-storage systems

Geoffrey W. Burr; Wu Chun Chou; Mark A. Neifeld; Hans Coufal; John A. Hoffnagle; C. Michael Jefferson

doi:10.1364/AO.37.005431

Experimental evaluation of user capacity in holographic data-storage systems

Geoffrey W. Burr, Wu Chun Chou, Mark A. Neifeld, Hans Coufal, John A. Hoffnagle, C. Michael Jefferson

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

An experimental procedure for determining the relation between the number of stored holograms and the raw bit-error rate (BER) (the BER before error correction) of a holographic storage system is described. Compared with conventional recording schedules that equalize the diffraction efficiency, scheduling of recording exposures to achieve a uniform raw BER is shown to improve capacity. The experimentally obtained capacity versus the raw-BER scaling is used to study the effects of modulation and errorcorrection coding in holographic storage. The use of coding is shown to increase the number of holograms that can be stored; however, the redundancy associated with coding incurs a capacity cost per hologram. This trade-off is quantified, and an optimal working point for the overall system is identified. This procedure makes it possible to compare, under realistic conditions, system choices whose impact cannot be fully analyzed or simulated. Using LiNbO₃ in the 90° geometry, we implement this capacityestimation procedure and compare several block-based modulation codes and thresholding techniques on the basis of total user capacity.

Original language	English (US)
Pages (from-to)	5431-5443
Number of pages	13
Journal	Applied optics
Volume	37
Issue number	23
DOIs	https://doi.org/10.1364/AO.37.005431
State	Published - Aug 10 1998

ASJC Scopus subject areas

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

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title = "Experimental evaluation of user capacity in holographic data-storage systems",

abstract = "An experimental procedure for determining the relation between the number of stored holograms and the raw bit-error rate (BER) (the BER before error correction) of a holographic storage system is described. Compared with conventional recording schedules that equalize the diffraction efficiency, scheduling of recording exposures to achieve a uniform raw BER is shown to improve capacity. The experimentally obtained capacity versus the raw-BER scaling is used to study the effects of modulation and errorcorrection coding in holographic storage. The use of coding is shown to increase the number of holograms that can be stored; however, the redundancy associated with coding incurs a capacity cost per hologram. This trade-off is quantified, and an optimal working point for the overall system is identified. This procedure makes it possible to compare, under realistic conditions, system choices whose impact cannot be fully analyzed or simulated. Using LiNbO3 in the 90° geometry, we implement this capacityestimation procedure and compare several block-based modulation codes and thresholding techniques on the basis of total user capacity.",

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AU - Burr, Geoffrey W.

AU - Chou, Wu Chun

AU - Neifeld, Mark A.

AU - Coufal, Hans

AU - Hoffnagle, John A.

AU - Jefferson, C. Michael

PY - 1998/8/10

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N2 - An experimental procedure for determining the relation between the number of stored holograms and the raw bit-error rate (BER) (the BER before error correction) of a holographic storage system is described. Compared with conventional recording schedules that equalize the diffraction efficiency, scheduling of recording exposures to achieve a uniform raw BER is shown to improve capacity. The experimentally obtained capacity versus the raw-BER scaling is used to study the effects of modulation and errorcorrection coding in holographic storage. The use of coding is shown to increase the number of holograms that can be stored; however, the redundancy associated with coding incurs a capacity cost per hologram. This trade-off is quantified, and an optimal working point for the overall system is identified. This procedure makes it possible to compare, under realistic conditions, system choices whose impact cannot be fully analyzed or simulated. Using LiNbO3 in the 90° geometry, we implement this capacityestimation procedure and compare several block-based modulation codes and thresholding techniques on the basis of total user capacity.

AB - An experimental procedure for determining the relation between the number of stored holograms and the raw bit-error rate (BER) (the BER before error correction) of a holographic storage system is described. Compared with conventional recording schedules that equalize the diffraction efficiency, scheduling of recording exposures to achieve a uniform raw BER is shown to improve capacity. The experimentally obtained capacity versus the raw-BER scaling is used to study the effects of modulation and errorcorrection coding in holographic storage. The use of coding is shown to increase the number of holograms that can be stored; however, the redundancy associated with coding incurs a capacity cost per hologram. This trade-off is quantified, and an optimal working point for the overall system is identified. This procedure makes it possible to compare, under realistic conditions, system choices whose impact cannot be fully analyzed or simulated. Using LiNbO3 in the 90° geometry, we implement this capacityestimation procedure and compare several block-based modulation codes and thresholding techniques on the basis of total user capacity.

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Experimental evaluation of user capacity in holographic data-storage systems

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