Detection of Readout Signals on High-track Density MO-Disk Using an Optical Phase Shifter and Deep Land/groove Recording

We report the results of magneto-optical (MO) detection using an optical phase shifter and a deep land/groove disk. We measured the recording characteristics in the direction of incident linear polarization and found that polarization perpendicular to the groove is best for a deep groove disk. Using...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1999-03, Vol.38 (3S), p.1768
Main Authors: Kai, Shinichi, Fukumoto, Atsushi, Aratani, ShinMasuhara
Format: Article
Language:English
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Summary:We report the results of magneto-optical (MO) detection using an optical phase shifter and a deep land/groove disk. We measured the recording characteristics in the direction of incident linear polarization and found that polarization perpendicular to the groove is best for a deep groove disk. Using perpendicular polarization, with a 693 nm wavelength diode laser and a 0.55- NA objective lens, sufficient readout and recording margins to guard against optical errors were obtained by the experiments at an area density of 3.69 Gbit/in 2 , which was obtained using a 0.35-µm bit length and a 0.5-µm track pitch.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.38.1768