GEN04-2: M-ary, Binary, and Space-Volume Multiplexing Trade-offs for Holographic Channels

Srinivasa, Shayan Garani; Momtahan, Omid; Karbaschi, Arash; McLaughlin, S.W.; Adibi, A.; Fekri, Faramarz

doi:10.1109/glocom.2006.162

Cited by 8 publications

(7 citation statements)

References 12 publications

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“…Holographic photopolymers, in which photoreactive monomers are homogeneously dispersed within a polymeric or inorganic glass, serve as a data storage medium (i.e., volume holographic data storage) . To maximize the data storage capacity (e.g., by multiplexing holograms), the diffraction efficiency of each recorded volume hologram (gratings) needs to be as close to 100% as possible . Once the thickness of the volume holographic medium is fixed, the diffraction efficiency is generally determined by the effective Δn in the recorded volume grating .…”

Section: Photopolymerization‐defined Micro/nanophotonic Structuringmentioning

confidence: 99%

Light‐Directed Soft Mass Migration for Micro/Nanophotonics

Kim

Park

et al. 2019

Advanced Optical Materials

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In this review, it is argued that soft mass migrations, driven and guided by spatially controlled photopolymerization and photochromic isomerization (also called directional plastic deformation or photofluidization of azobenzene materials), offer toolsets for optical engineers to develop various micro/nanophotonic materials and devices that are not readily available with conventional lithographic methods and self‐assembly techniques. In this direction, the two seemingly different concepts of (i) photopolymerization and (ii) photochromic‐isomerization‐driven mass migrations are tied together, and then recent technological advances in these two fields are summarized, including diffractive optical elements (DOEs), electro‐optic DOE devices, colorimetric sensors, biologically inspired optics, plasmonic devices and near‐field studies, and exceptional point optics. This review establishes the technological viability of light‐directed soft mass migration for the overall evolving field of micro/nanophotonics and its research perspectives.

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Section: Photopolymerization‐defined Micro/nanophotonic Structuringmentioning

confidence: 99%

Light‐Directed Soft Mass Migration for Micro/Nanophotonics

Kim

Park

et al. 2019

Advanced Optical Materials

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“…We are interested in the theoretical limits for the amount of information that can be physically stored in and retrieved from a holographic memory 24 with a negligible probability of error. In other words, the entire process of storing and retrieving information from a holographic memory can be viewed as transmitting a message over a 2-D channel such that the encoded source message is reconstructed from the output with a low probability of error.…”

Section: ͑11͒ 3 Holographic Channel Capacity and Volumetric Storage Dmentioning

confidence: 99%

Volumetric storage limits and space-volume multiplexing trade-offs for holographic channels

et al. 2010

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We consider M-ary signaling in page-oriented holographic storage systems that multiplex pages using three methods: conventional angular multiplexing throughout the volume, localized recording, and a combination of angular multiplexing within localized recording. We study the mutual information transfer, which is increasingly easy to achieve in practice, between the recorded and recovered data, and use it to assess the storage density in these systems. We use the existing holographic channel model for the dominant Rician noise case for deriving the mutual information bound on the capacity and examine the interplay between the storage density and the number of recorded pages within the medium. We quantify through information-theoretical analysis that it is possible to obtain considerably higher storage capacities using gated localized holography than what can be achieved in conventional volume holography with angular multiplexing by appropriately optimizing the number of intensity levels for a given material constant and signal-tonoise ratio.

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“…IPI refers to when a page affects another page because they are stored at the same volume. HDS stores data in two-dimensional (2D) pages so 2D-ISI occurs in the horizontal and vertical directions, unlike in traditional storage devices which have 1D-ISI between the adjacent either pixels or symbols [7]. This 2D-ISI decreases performance.…”

Section: Introductionmentioning

confidence: 99%