Present and future of 3.5-in. magneto-optical disk

Seiya Ogawa; Keiji Shono

doi:10.1117/12.318500

10 August 1998 Present and future of 3.5-in. magneto-optical disk

Seiya Ogawa, Keiji Shono

Proceedings Volume 3562, Optical Storage Technology; (1998) https://doi.org/10.1117/12.318500
Event: Photonics China '98, 1998, Beijing, China

Abstract

The current 3.5' MO disk has a capacity of 640 MB. To increase capacity/recording density, we investigated magnetically induced super resolution. Double mask rear aperture detection is described, resulting in two to four times increase in capacity. In future we want to achieve 15 GB or 20 Gb/in² five years later from now and 150 GB ten years later. Various technologies to achieve them are surveyed. To increase performance we proposed multi-beam optical head. Laser-assisted magnetic recording will be a breakthrough to the density limitation of magnetic recording caused by thermal fluctuation.

Citation Download Citation

Seiya Ogawa and Keiji Shono "Present and future of 3.5-in. magneto-optical disk", Proc. SPIE 3562, Optical Storage Technology, (10 August 1998); https://doi.org/10.1117/12.318500

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