Image oversampling for page-oriented optical data storage

Ayres, Mark; Hoskins, Alan; Curtis, Kevin

doi:10.1364/ao.45.002459

Cited by 45 publications

(25 citation statements)

References 8 publications

(11 reference statements)

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“…The reproduced signal beams are imaged on a 2200 × 1726 pixels camera with a 7-μm pixel pitch and detected with an over-sampling detection process. 16 In this experimental system, the holographic medium was forced to be tilted 20 deg to eliminate the directional reflection from the medium and to keep the reflected beam out from the camera because the performance of anti-reflective (AR) coating coated on the surface of HDS-3000 was not sufficient. Therefore, the objective lens was not placed parallel to the holographic medium yet in this experiment.…”

Section: Verification Of the Validity Of The Monocular Architecturementioning

confidence: 99%

New optical architecture for holographic data storage system compatible with Blu-ray Disc™ system

et al. 2014

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Abstract. A new optical architecture for holographic data storage system which is compatible with a Blu-ray Disc™ (BD) system is proposed. 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. The geometry of the architecture brings a high affinity with an optical architecture in the BD system because the objective lens can be placed parallel to a holographic medium. Through the comparison of experimental results with theory, the validity of the optical architecture was verified and demonstrated that the conventional objective lens motion technique in the BD system is available for angularly multiplexed recording. The test-bed composed of a blue laser system and an objective lens of the NA 0.85 was designed. The feasibility of its compatibility with BD is examined through the designed test-bed.

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Section: Verification Of the Validity Of The Monocular Architecturementioning

confidence: 99%

New optical architecture for holographic data storage system compatible with Blu-ray Disc™ system

et al. 2014

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“…Such a configuration has the advantages of maintaining a low detector bandwidth, while also shifting the burden from preventing detector misalignment to measuring detector alignment. Ayres et al developed a sub-Nyquist oversampling methodology that can recover arbitrarily aligned and distorted megapixel data page images with pixel-matched fidelity by using fewer than double the number of detector pixels [96]. The method consists of a novel alignment measurement technique that uses covariance calculations to accurately locate pseudorandom fiducial marks and a linear resampling filter with coefficients that vary according to the local pixel alignment.…”

Section: Misalignment-compensation Schemementioning

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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“…A custom-developed tunable ECDL at 405 nm will enable thermal compensation algorithms. The mature FPGA-based oversampled data channel will decode the holographic images [5], and extant algorithms will perform the complex multi-axis recovery alignment processes [6]. Thus the demonstrator, as it is developed, will be born into a state of extraordinarily high functionality.…”

Section: Demonstrator Architecturementioning

confidence: 99%