[OPTICAL REVIEW Vol. 1, No. 2 (1994) 180-182]

High Speed and High Density Recording in a Phase Change Rewritable Disk System

Toshiyuki SHIMADA,1 Kenji KOISHI,2 Shigeru FURUMIYA2 and Shigeaki FURUKAWA3

1Information and Communications Technology Laboratory, 2Audio Video Information Technology Laboratory, 3Materials and Devices Laboratory, Matsushita Electric Industrial Co., Ltd., 1006 Kadoma, Osaka, 571 Japan

(Accepted September 20, 1990)

A Phase Change Rewritable optical disk system with a high density of 0.57 μm/bit and high transfer rate up to 46.3 Mbps is presented. In this system, the Mark Edge Recording method is used to attain the total capacity of 19 GB in a double-sided 300 mm-diameter disk. Since this method requires precise recording mark length, a write compensation method, disk media and read data detection method suitable for a wide range of scanning linear velocities ranging from 10.7 to 27.4 m/s have been developed.

Key words : optical disk, high density, high transfer rate, mark edge recording, jitter, write compensation, data detection