Improvement of Storage Capacity Using Confocal Scheme in Reflection-Type Holographic Memory System with Speckle Shift Multiplexing

Matoba, Osamu; Yonetani, Yusuke; Nitta, Katsumi

doi:10.7567/jjap.50.09me08

Jpn. J. Appl. Phys.

2011

DOI: 10.7567/jjap.50.09me08

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Improvement of Storage Capacity Using Confocal Scheme in Reflection-Type Holographic Memory System with Speckle Shift Multiplexing

Osamu Matoba

Yusuke Yonetani

Katsumi Nitta

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Cited by 5 publications

(1 citation statement)

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“…Polytopic multiplexing permits high-density angular multiplexing because a polytopic filter removes crosstalk in a Fourier plane [10,11]. In addition, the feasibility of the filter has shown in threedimensional speckle shift multiplexing [12]. These methods, however, are unable to suppress the crosstalk within the spatial-frequency bandwidth of a data page that is to be reconstructed.…”

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confidence: 99%

Multiplexed recording with uncorrelated computer-generated reference patterns in coaxial holographic data storage

2015

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A computer-generated reference pattern (CGRP) allows improvement in light efficiency and the quality of reconstructed data in coaxial holographic data storage. In this Letter, a multiplexed recording method with uncorrelated CGRPs is proposed. With this method, crosstalk from adjacent holograms is suppressed without shifting a medium. To confirm the feasibility of the proposed method experimentally, shift selectivity is investigated, and then multiplexed recording is performed. Experimental results show that the proposed method enables high-density recording compared with conventional shift multiplexing. In addition, a theoretical analysis implies that at least 100 uncorrelated CGRPs can be designed and used for multiplexed recording.

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mentioning

confidence: 99%

Multiplexed recording with uncorrelated computer-generated reference patterns in coaxial holographic data storage

2015

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Multiplexed recording based on the reference wave correlation for computer-generated holographic data storage

Saita

Matsumoto

Yoneda

et al. 2020

Opt Rev

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Design method of input phase mask to improve light use efficiency and reconstructed image quality for holographic memory

Saita

Nomura

2014

Appl. Opt.

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A design method of an input phase mask for holographic memory is proposed. In the method, a modification of a design procedure and another restraint condition are applied to our conventional design method. The light use efficiency and the quality of a reconstructed image are improved. The performance of an input phase mask designed by the method is confirmed by numerical simulations. Finally, a suitable design condition of an input phase mask is determined from simulation results.

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Improvement of Storage Capacity Using Confocal Scheme in Reflection-Type Holographic Memory System with Speckle Shift Multiplexing

Cited by 5 publications

References 11 publications

Multiplexed recording with uncorrelated computer-generated reference patterns in coaxial holographic data storage

Multiplexed recording with uncorrelated computer-generated reference patterns in coaxial holographic data storage

Multiplexed recording based on the reference wave correlation for computer-generated holographic data storage

Design method of input phase mask to improve light use efficiency and reconstructed image quality for holographic memory

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