Analysis of Phase Multilevel Recording on Microholograms

Ide, Tomohiro; Mikami, Hideharu; Osawa, Kazutoshi; Watanabe, Keiji

doi:10.7567/jjap.50.09me01

Jpn. J. Appl. Phys.

2011

DOI: 10.7567/jjap.50.09me01

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Analysis of Phase Multilevel Recording on Microholograms

Tomohiro Ide¹,

Hideharu Mikami²,

Kazutoshi Osawa³

et al.

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2014

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“…The use of the multilevel phase and amplitude modulated signals for a recording data has recently been proposed. [1][2][3][4] The plural information obtained by changing both the amplitude and phase is useful for improving the recording density in the holographic memory markedly.…”

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confidence: 99%

Multilevel phase and amplitude modulation method for holographic memories with programmable phase modulator

Honma

Sekiguchi

2014

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The utilization of spatial quadrature amplitude modulation (SQAM) signals with amplitude and phase modulation is a simple method used to improve storage capacity in a holographic data storage system. We propose a multilevel phase and amplitude modulation method for holographic memories with a programmable phase modulator (PPM). In this method, holographic page data is recorded by a two-step exposure process for different phase-modulated data. There is no need to adjust the positions of spatial light modulators (SLM) with high accuracy because we use only one spatial modulator. We estimate the quality of 16 SQAM signals produced by our technique.

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mentioning

confidence: 99%

Multilevel phase and amplitude modulation method for holographic memories with programmable phase modulator

Honma

Sekiguchi

2014

OPT REV

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Analysis of Phase Multilevel Recording on Microholograms

Cited by 1 publication

References 11 publications

Multilevel phase and amplitude modulation method for holographic memories with programmable phase modulator

Multilevel phase and amplitude modulation method for holographic memories with programmable phase modulator

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