High density recording using monocular architecture for 500GB consumer system

Shimada,; Ishii,; Ide,; Hughes, Victoria; Hoskins,; Curtis, E. A.

doi:10.1109/ods.2009.5031754

Cited by 10 publications

(8 citation statements)

References 3 publications

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“…2 . 17) In 2012, we confirmed a high-density recording of 1 Tbit=in. 2 corresponding to a disc capacity of 1 TB, by the recording technique in which a constant signalto-scatter ratio (SSR) is obtained.…”

Section: Introductionsupporting

confidence: 64%

Practical angular-multiplexing holographic data storage system with 2 terabyte capacity and 1 gigabit transfer rate

Hoshizawa

Shimada

Fujita

et al. 2016

Jpn. J. Appl. Phys.

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Aiming at the realization of an optical data storage system with a large disc capacity and a high transfer rate suitable for digital data archiving, we have defined the specifications of an angular-multiplexing holographic data storage system with a disc capacity of 2 TB and a transfer rate of 1 Gbps on the basis of a run-length-limited (RLL) high-density recording method using RLL modulation. To realize the specifications, RLL turbo coding, a servo system for the reference beam angle, and a servo system for book tracking were newly invented. Also, to satisfy the specifications, a holographic disc and several key components were developed in cooperation with several specialty companies. Eventually, we confirmed a high-density recording of 2.4 Tbit/in.2 achieved by the RLL high-density recording method, using evaluation equipment complying with the specifications for single book recording.

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Section: Introductionsupporting

confidence: 64%

Practical angular-multiplexing holographic data storage system with 2 terabyte capacity and 1 gigabit transfer rate

Hoshizawa

Shimada

Fujita

et al. 2016

Jpn. J. Appl. Phys.

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“…Page recording and reproduction enable a transfer rate more than ten times higher than that of conventional optical discs, because one page containing megabit-order of data is recorded or reproduced with only one shot of laser exposure to the medium. Previously, we developed an experimental holographic memory system and confirmed raw recording densities of 663 29) and 1,005 Gbit=in. 2 .…”

Section: Introductionmentioning

confidence: 65%

Highly accurate servo control of reference beam angle in holographic memory with polarized servo beam

Hosaka¹,

Ogata²,

Yamada³

et al. 2016

Jpn. J. Appl. Phys.

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We propose a new servo technique for controlling the reference beam angle in angular multiplexing holographic memory to attain higher capacity and higher speed data archiving. An orthogonally polarized beam with an incident angle slightly different from that of the reference beam is newly applied to the optics. The control signal for the servo is generated as the difference between the diffracted light intensities of these two beams from a hologram. The incident angle difference between the beams to the medium was optimized as sufficient properties of the control signal were obtained. The high accuracy of the control signal with an angle error lower than 1.5 mdeg was successfully confirmed in the simulations and experiments.

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“…Proposed by InPhase Technologies (and later, Akonia Holographics LLC) and Hitachi Corporation, the monocular architecture is promising because it reduces the drive size and complexity by placing both the data and reference beams through a single objective lens [17,[20][21][22]. In the architecture, both signal and reference beams pass through a single objective lens with numerical aperture (NA) 0.85 for realizing angularly multiplexed recording.…”

Section: -Axis 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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High density recording using monocular architecture for 500GB consumer system

Abstract: Monocular architecture is an attractive candidate for a consumer drive. A raw data density of 663Gbits/inch 2 was achieved using this architecture with a blue laser and a high NA objective lens.978-1-4244-3343-8/09/$25.00©2009 IEEE

Cited by 10 publications

References 3 publications

Practical angular-multiplexing holographic data storage system with 2 terabyte capacity and 1 gigabit transfer rate

Practical angular-multiplexing holographic data storage system with 2 terabyte capacity and 1 gigabit transfer rate

Highly accurate servo control of reference beam angle in holographic memory with polarized servo beam

Recent advances in holographic data storage

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