High-density recording for greater than 1-GByte capacity using a 90-mm phase-change optical disk

Hiromichi Kobori; Hiroshi Hasegawa; Toshihiro Sugaya; Naoki Morishita; Naomasa Nakamura; Katsumi Suzuki

doi:10.1117/12.190174

12 October 1994 High-density recording for greater than 1-GByte capacity using a 90-mm phase-change optical disk

Hiromichi Kobori, Hiroshi Hasegawa, Toshihiro Sugaya, Naoki Morishita, Naomasa Nakamura, Katsumi Suzuki

Proceedings Volume 2338, 1994 Topical Meeting on Optical Data Storage; (1994) https://doi.org/10.1117/12.190174
Event: Optical Data Storage '94, 1994, Dana Point, CA, United States

Abstract

The mark edge recording characteristics of a new thermally balanced phase-change optical disk operating at a wavelength of 690 nm have been studied, especially from the viewpoint of designing an optical disk drive. As a recording method, the multi-pulse write compensation method with constant duration of the read power level immediately after every multi-pulse, called the off-pulse, was applied. A high carrier-to-noise ratio (CNR) of 54 dB, a high erasability of 35 dB, and an overwrite power margin from -15% to +5% were obtained for a bit length of 0.5 micrometers and a track pitch of 1.0 micrometers at 14.7 m/s linear velocity. These results mean that it is possible to design an optical disk drive providing a capacity of 1.1 GBytes using a 90 mm double-sided disk. Further, it has been found that the off-pulse plays a very important role in controlling the precision of mark edge recording.

Citation Download Citation

Hiromichi Kobori, Hiroshi Hasegawa, Toshihiro Sugaya, Naoki Morishita, Naomasa Nakamura, and Katsumi Suzuki "High-density recording for greater than 1-GByte capacity using a 90-mm phase-change optical disk", Proc. SPIE 2338, 1994 Topical Meeting on Optical Data Storage, (12 October 1994); https://doi.org/10.1117/12.190174

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