Coaxing the Maximum Performance out of an Ordinary Structured MO Disk

Aratani, Katsuhisa; Narahara, Tatsuya; Fukumoto, Atsushi; Masuhara, Shin; Arakawa, Nobuyuki; Takemoto, Y.; Takeshita, Yasuyuki

doi:10.1143/jjap.35.433

Cited by 4 publications

(1 citation statement)

References 5 publications

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“…Now, however, a much larger capacity is needed for multimedia applications. We have investigated magneto-optical recording on a conventionally structured disk using magnetic field modulation [2]. We have developed and standardized MD DA TA2 to achieve a capacity of 650 Mbytes, which equals that of a CD-ROM.…”

Section: Introductionmentioning

confidence: 99%

HIGH-DENSITY MAGNETO-OPTICAL DISK RECORDING USING MAGNETIC FIELD MODULATION WITH A CAPACITY OF 650 MB/ø64 mm

et al. 1998

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Abstract-We have investigated high-density magneto-optical recording on a conventionally structured disk with a diameter of 64 millimeters using magnetic field modulation to achieve a capacity of 650 Mbytes. With the groove conditions optimized, the jitter with cross-talk from adjacent tracks was 7.2% and the recording power margin including overwriting and crosswriting was ±20%. As a result of minimizing cross-talk, a sufficient tilt margin of ±0.82 degree and ±O.63 degree in the radial and tangential direction, respectively, was obtained.

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Section: Introductionmentioning

confidence: 99%

HIGH-DENSITY MAGNETO-OPTICAL DISK RECORDING USING MAGNETIC FIELD MODULATION WITH A CAPACITY OF 650 MB/ø64 mm

et al. 1998

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Partial-Response Maximum-Likelihood Detection Method for Magneto-Optical Recording

Narahara

Aratani

Fukumoto

et al. 1997

Jpn. J. Appl. Phys.

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We detected bits sized at 0.237 µm bit length and 0.85 µm track pitch recorded by magnetic field modulation on a magneto-optical disk with a 690-nm laser diode and 0.60-numerical-aperture-objective using a partial-response maximum-likelihood detection method. We confirmed that the optimum partial-response for this high linear density had four coefficients of 1 by analyzing difference metrics of error critical paths. The recorded bits with areal density of 5.6 bit/µm2 were also detected at a low error rate, which combination is 0.237-µm bit length and 0.75-µm track pitch. Its write power tolerance is limited to ±22%.

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A Thermal Analysis of a Magneto-Optical Recording Mechanism with the Magnetic Field Modulation Method on a Land and Groove Substrate

Nakaoki¹,

Kaneko²

2000

Jpn. J. Appl. Phys.

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The power tolerance in recording is one of the most significant issues in the case of rewritable optical disk systems. Magneto-optical land/groove recording has been investigated by magnetic field modulation with pulse irradiation. The lower limit and the upper limit of the power tolerance are determined from the overwriting and the crosswrite characteristics, respectively. The experimental dependence of the power tolerance on track pitch, pulse duty, and optical spot size has been in good agreement with our model based on the thermal analysis. According to our model, the mark width is exactly the width of a recording track for the lower limit of power tolerance, and it spreads into the neighboring track for the upper limit. The deep groove substrate has been found experimentally and theoretically to be effective for improving the power tolerance.

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Coaxing the Maximum Performance out of an Ordinary Structured MO Disk

Cited by 4 publications

References 5 publications

HIGH-DENSITY MAGNETO-OPTICAL DISK RECORDING USING MAGNETIC FIELD MODULATION WITH A CAPACITY OF 650 MB/ø64 mm

HIGH-DENSITY MAGNETO-OPTICAL DISK RECORDING USING MAGNETIC FIELD MODULATION WITH A CAPACITY OF 650 MB/ø64 mm

Partial-Response Maximum-Likelihood Detection Method for Magneto-Optical Recording

A Thermal Analysis of a Magneto-Optical Recording Mechanism with the Magnetic Field Modulation Method on a Land and Groove Substrate

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