Pixel-matched holographic data storage with megabit pages

Shelby, R. M.; Hoffnagle, John A.; Burr, Geoffrey W.; Jefferson, C. Michael; Bernal, Maria–Pilar; Coufal, H.; Grygier, R. K.; Günther, H; Macfarlane, R. M.; Sincerbox, Glenn T.

doi:10.1364/ol.22.001509

Cited by 159 publications

(66 citation statements)

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“…Such 2D optical intensity channels have been used in a variety of applications such as holographic data storage [1][2][3], page-oriented optical recording [4,5], 2D barcodes [6,7], and multiple-input/multiple-output (MIMO) wireless optical communications [8][9][10][11]. A major practical problem of many of these applications is the requirement of strict alignment between the transmitter and the receiver in order to avoid inter-channel interference [1,2,12].…”

Section: Introductionmentioning

confidence: 99%

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Two-dimensional binary halftoned optical intensity channels

Mohamed¹,

Hranilovic²

2008

IET Commun.

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This paper considers the capacity of two-dimensional optical intensity channels in which transmit images are constrained to be binary-level. Examples of such links exist in holographic storage, page-oriented memories, optical interconnects, two-dimensional barcodes, as well as MIMO wireless optical links. Data are transmitted by sending a series of time-varying binary-level optical intensity images from transmitter to receiver. Strict spatial alignment between transmitter and receiver is not required nor is independence among the spatial channels assumed. Our approach combines spatial discrete multitone modulation developed for spatially frequency selective channels with halftoning to produce a binary-level output image. Data is modulated in spatial frequency domain as dictated by a water pouring spectrum over the optical transfer function as well as channel and quantization noise. A binary-level output image is produced by exploiting the excess spatial bandwidth available at the transmitter to shape quantization noise out of band. We present a general mathematical framework in which such systems can be analyzed and designed. In a pixelated wireless optical channel application, halftoning achieves 99.8% of the capacity of an equivalent unconstrained continuous amplitude channel using 1 megapixel arrays.

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Section: Introductionmentioning

confidence: 99%

“…A major practical problem of many of these applications is the requirement of strict alignment between the transmitter and the receiver in order to avoid inter-channel interference [1,2,12]. Such a system is termed "pixel matched", i.e.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional binary halftoned optical intensity channels

Mohamed¹,

Hranilovic²

2008

IET Commun.

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“…Incoming data is either parallelized and transmitted over multiple beams, while when a SLM is employed, data is sent by creating a series of twodimensional (2D) optical intensity images. OW MIMO links require tight spatial alignment between the transmitter and receiver arrays to avoid interference between the channels [71][72][73]. Recently a spatial processing technique that does not require tight spatial alignment has been developed for OW MIMO links [74,75].…”

Section: Point-to-point Linksmentioning

confidence: 99%

A review of communication-oriented optical wireless systems

Borah

Boucouvalas

Davis

et al. 2012

J Wireless Com Network

188

104

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This article presents an overview of optical wireless (OW) communication systems that operate both in the short-(personal and indoor systems) and the long-range (outdoor and hybrid) regimes. Each of these areas is discussed in terms of (a) key requirements, (b) their application framework, (c) major impairments and applicable mitigation techniques, and (d) current and/or future trends. Personal communication systems are discussed within the context of point-to-point ultra-high speed data transfer. The most relevant application framework and related standards are presented, including the next generation Giga-IR standard that extends personal communication speeds to over 1 Gb/s. As far as indoor systems are concerned, emphasis is given on modeling the dispersive nature of indoor OW channels, on the limitations that dispersion imposes on user mobility and dispersion mitigation techniques. Visible light communication systems, which provide both illumination and communication over visible or hybrid visible/ infrared LEDs, are presented as the most important representative of future indoor OW systems. The discussion on outdoor systems focuses on the impact of atmospheric effects on the optical channel and associated mitigation techniques that extend the realizable link lengths and transfer rates. Currently, outdoor OW is commercially available at 10 Gb/s Ethernet speeds for Metro networks and Local-Area-Network interconnections and speeds are expected to increase as faster and more reliable optical components become available. This article concludes with hybrid optical wireless/radio-frequency (OW/RF) systems that employ an additional RF link to improve the overall system reliability. Emphasis is given on cooperation techniques between the reliable RF subsystem and the broadband OW system.

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“…En fait, très souvent, c'est la distorsion du front d'onde créée par ces aberrations qui limite la résolution. Des images d'un million de pixels ont néanmoins été enregistrées et relues dans des échantillons de LïNbOz [109]. …”

Section: Résolution Des Imagesunclassified

L'effet photoréfractif

Pauliat

Roosen

1998

l'Optique Non Linéaire Et Ses Matériaux

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Résumé : La souplesse d'emploi des matériaux photoréfractifs est un de leurs principaux attraits. Un même échantillon est sensible sur une plage de longueurs d'onde de plus de 100 nm avec des temps de réponse s'étageant de moins d'une nanoseconde à plus d'une seconde en fonction de la puissance optique mise en jeu. Cette richesse explique le succès de l'effet photoréfractif et aussi les centaines de publications annuelles sur ce sujet. De nombreux matériaux photoréfractifs aux caractéristiques très diverses sont disponibles commercialement. Bien qu'il ne soit pas possible de résumer ici l'ensemble de ces résultats, nous présentons les notions indispensables à la compréhension de ce phénomène nonlinéaire, à l'utilisation de ces matériaux, et au choix des échantillons. Nous n'abordons pas le vaste domaine des applications.

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Pixel-matched holographic data storage with megabit pages

Cited by 159 publications

References 1 publication

Two-dimensional binary halftoned optical intensity channels

Two-dimensional binary halftoned optical intensity channels

A review of communication-oriented optical wireless systems

L'effet photoréfractif

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