Drive system and readout characteristics of Micro-Reflector optical disc

Saito, Kimihiro; Horigome, Toshihiro; Miyamoto, Hirotaka; Yamatsu, Hisayuki; Tanabe, Norihiro; Hayashi, Kei; Fujita, Goro; Kobayashi, Seiji; Kudo, Takao; Uchiyama, Hiroshi

doi:10.1364/ods.2007.mb1

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…The estimated amplification of signal amplitude was 13 times. From these results, we believe that the homodyne detection technique is essential for fully utilizing the huge capacity of multilayer optical discs and is also applicable to other optical memory technologies such as microhologram [13], near field recording [14], and super resolution [15].…”

Section: Resultsmentioning

confidence: 99%

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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Section: Resultsmentioning

confidence: 99%

Demonstration of readout-signal quality improvement by homodyne detection

et al. 2009

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“…Confocal reflection is the most common method, but unfortunately it is inefficient when reading 3D marks written by a single focused beam [35]. This has inspired a number of groups to examine microholographic recording in which two counterpropagating beams write a small reflection grating at their mutual focus, which then is efficiently detected in confocal reflection [36][37][38][39][40][41][42].…”

Section: Background and Motivationmentioning

confidence: 99%

Impact of phase aberrations caused by multilayer optical data storage in weakly inhomogeneous media

McLeod

2009

J. Opt. Soc. Am. B

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Various multilayer optical data storage methods have been proposed in which bits are written in an initially homogeneous material. To varying degrees, all of these methods will be constrained by phase aberrations that decrease the Strehl ratio as the number of layers and index perturbation of each bit are increased. Although the exact problem is theoretically and numerically intractable, statistical derivations of the impact are possible. These analytic expressions are derived and validated with simulations of low-capacity disks, and then are used to establish limits in the interesting high-capacity case. The resulting approximate expressions are shown to be remarkably simple and also potentially serious in limiting multilayer data storage capacities.

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