Optical Recording at 2.4 Gbit/in^2 Using a Frequency Doubled Diode Laser
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概要
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Optical recording at 2.4 Gbit/in^2 has been demonstrated at both 488 nm (argon-ion laser) and at 429 nm (doubled diode laser) using TbFeCo and CoPt multilayers on flat glass media with a soft sampled servo tracking system. The data was written using pulse width modulation (PWM), 2/3 (1, 7) run length limited (RLL) encoding, and detection accomplished using a dual clock channel. Edge shifts of 3.5% of the timing window and jitters of 7% of the timing window were observed. At a data rate of 2 M Bytes/s and with data written on adjacent tracks, a bit error rate of 10^<-5> with noise margins of 10 dB and 8.5 dB were measured at 488 nm and 429 nm, respectively.
- 社団法人応用物理学会の論文
- 1993-11-30