150 GB, 6-Layer Write Once Disc for Blu-ray Disc System

Mishima, Koji; Yoahitoku, D.; Itoh, Hidetake; Yamatsu, Shigeru; Inoue, Hiroyasu; Komaki, Tsuyoshi; Tanaka, Koshi; Aoi, Toshiki

doi:10.1109/ods.2006.1632739

Cited by 12 publications

(13 citation statements)

References 3 publications

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“…The calculated reflectivity for several numbers of layers is summarized in Table 1. These values are consistent with the previous reports of multi-layer discs [1][2][3][4][5][6][7].…”

Section: Methodssupporting

confidence: 93%

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Demonstration of readout-signal quality improvement by homodyne detection

et al. 2009

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We experimentally demonstrated improvement in optical disc readout signal quality by homodyne detection. We introduced an optical phase servo system as an alternative to the phase-diversity detection scheme for stabilization of the interference signal in homodyne detection, which resulted in further enhancement of readout signal quality. Experimental results indicate that at least a 16-layer recordable disc can be reliably read out with a jitter of less than 8% at a 1-mW read power by homodyne detection. The estimated amplification of signal amplitude was 13 times.

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“…The calculated reflectivity for several numbers of layers is summarized in Table 1. These values are consistent with the previous reports of multi-layer discs [1][2][3][4][5][6][7].…”

Section: Methodssupporting

confidence: 93%

“…Currently, write-once discs with up to six layers (200 Gbytes) and read-only memory (ROM) discs up to twenty-layers (500 Gbytes) have been demonstrated [1][2][3][4][5][6][7]. However, multilayer recording suffers from a serious decrease in signal level, which causes an insufficient signal-to-noise ratio (SNR).…”

Section: Introductionmentioning

confidence: 99%

Demonstration of readout-signal quality improvement by homodyne detection

et al. 2009

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“…15 Figure 8 illustrates its cross-sectional diagram. Different spacers (t 10 to t 54 ) were formed with UV-curable resin, spin-coated on a 1.1 mm thick substrate in order to avoid signal deteriorations owing to internal multiple reflections.…”

Section: Six-layer Recording Equivalent To a 200 Gb Capacitymentioning

confidence: 99%

“…As described in Ref. 15, inorganic high-transmissive recording materials were sputtered on the groove-structured spacers, and the reflectivity of each information layer was designed for the signals to be equal after a round trip of the illuminating beams. A 38 µm thick resin cover and a 2 µm thick hard-coat layer were also spin-coated on top of recording stacks.…”

Section: Six-layer Recording Equivalent To a 200 Gb Capacitymentioning

confidence: 99%

High-density multilayer optical disc storage

et al. 2007

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High-density multilayer optical disc storage was investigated by employing advanced signal processing methods such as adaptive equalization and adaptive partial-response maximum-likelihood (PRML) detection. Preliminary experiments, recording on single-layer and dual-layer Blu-ray discs (BD), indicate storage capability of 33.3 GB/layer with adaptive 5-tap PRML. A new signal qualification method, sequenced amplitude margin quasi-error estimation (SAMQES), was introduced for high-density multilayer recording, and possibility toward a total storage capacity of 200 GB was examined by using a six-layer BD-Recordable disc. Despite coherent interlayer crosstalk and lower signal-to-noise ratio, SAMQES showed moderate increase from those in single-layer recording.

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“…One of the most straightforward methods of increasing recording capacity is by physically stacking multiple recording layers [1][2][3][4] [see Fig. 1(a)].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Recording of 200 Gbytes in Three-Dimensional Optical Disk by a 405 nm Wavelength Picosecond Laser

Ueda¹,

Saito²,

Iwamura³

et al. 2011

Jpn. J. Appl. Phys.

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We present experimental results of our volumetric optical data storage system. To achieve volumetric recording over a wide depth range of 250 m in a recording medium, we developed a relay lens system for compensating for the spherical aberration of a high-numerical-aperture (0.85) objective lens. The disk employs a single monolithic recording layer and a reference layer for servo control. A 405-nm-wavelength titanium:sapphire laser that exhibits 2 ps pulse duration and a more than 2 kW peak power is used for recording. We adopted void formation and mark position as recording principles. We have experimentally demonstrated 34-layer dynamic recording, corresponding to a capacity of 200 Gbytes. #

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150 GB, 6-Layer Write Once Disc for Blu-ray Disc System

Cited by 12 publications

References 3 publications

Demonstration of readout-signal quality improvement by homodyne detection

Demonstration of readout-signal quality improvement by homodyne detection

High-density multilayer optical disc storage

Dynamic Recording of 200 Gbytes in Three-Dimensional Optical Disk by a 405 nm Wavelength Picosecond Laser

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