415 Gbit/in.&lt;sup&gt;2&lt;/sup&gt; recording in coaxial holographic storage using low-density parity-check codes

Tanaka, Kenji; Hara, Masaaki; Tokuyama, Kazutatsu; Hirooka, Kazuyuki; Okamoto, Yoshiki; Mori, Hidenori; Fukumoto, Atsushi; Okada, Kanzo

doi:10.1109/ods.2009.5031755

Cited by 17 publications

(9 citation statements)

References 4 publications

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“…The average bit error rate was 0.09 without any error correction code (ECC). Using low-density parity-check (LDPC) code as an ECC [5], we successfully attained error-free decoding for all pages. …”

Section: Validation Resultsmentioning

confidence: 99%

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Development of a coaxial-type holographic disk system with a small drive

Takasaki

Mori

Yamada

et al. 2009

2009 Optical Data Storage Topical Meeting

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Section: Validation Resultsmentioning

confidence: 99%

“…SLM: We use an integrated phase mask spatial light modulator (IPM/SLM) to help keep the optical system simple and stable. Developed with Displaytech, Inc., it consists of a ferroelectric liquid crystal (FLC) panel (pixel size 10.7 Pm) and a pixel-matched random-binary phase mask [5].…”

Section: Aodmentioning

confidence: 99%

Development of a coaxial-type holographic disk system with a small drive

Takasaki

Mori

Yamada

et al. 2009

2009 Optical Data Storage Topical Meeting

Self Cite

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“…Furthermore, this technique is not limited to an angle multiplexing system and can be applied to any architecture that employs page data, for example, a coaxial system. 20,21) …”

Section: Principle Of Interpixel Crosstalk Cancellationmentioning

confidence: 99%

Interpixel crosstalk cancellation on holographic memory

Ishii

Fujimura

2017

Jpn. J. Appl. Phys.

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In holographic memory systems, there have been no practical techniques to minimize interpixel crosstalk thus far. We developed an interpixel crosstalk cancellation technique using a checkerboard phase pattern with a phase difference of π/2, which can decrease the size of the spatial filter along the Fourier plane with the signal-to-noise ratio (SNR) kept high. This interpixel crosstalk cancellation technique is simple because it requires only one phase plate in the signal beam path. We verified the effect of such a cancellation technique by simulation. The improvement of SNR is maximized to 6.5 dB when the filter size specified in the Nyquist areal ratio is approximately 1.05 in ideal optical systems with no other fixed noise. The proposed technique can improve SNR by 0.85 in an assumed monocular architecture at an actual noise intensity. This improvement of SNR is very useful for realizing high-density recording or enhancing system robustness.

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“…Using correlation multiplexing, the team has demonstrated channel densities around 400 Gbit/in. 2 [39,40].…”

Section: Collinear Holographic Storagementioning

confidence: 99%

Recent advances in holographic data storage

Ruan

2014

Front. Optoelectron.

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Nowadays, big-data centers still rely on hard drives. However, there is strong evidence that these surface-storage technologies are approaching fundamental limits that may be difficult to overcome, as ever-smaller bits become less thermally stable and harder to access. An intriguing approach for next generation data-storage is to use light to store information throughout the threedimensional (3D) volume of a material. Holographic data storage (HDS) is poised to change the way we write and retrieve data forever. After many years of developing appropriate recording media and optical read-write architectures, this promising technology is now moving industriously to the market. In this paper, a review of the major achievements of HDS in the past ten years is presented and the key technique details are discussed. The author concludes that HDS technology is an attractive candidate for big data centers in the future. On the other hand, there are many challenges ahead for HDS technology to overcome in the years to come.

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415 Gbit/in.<sup>2</sup> recording in coaxial holographic storage using low-density parity-check codes

Cited by 17 publications

References 4 publications

Development of a coaxial-type holographic disk system with a small drive

Development of a coaxial-type holographic disk system with a small drive

Interpixel crosstalk cancellation on holographic memory

Recent advances in holographic data storage

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