Higher capacity optical disk subsystem using a sampled servo format

Shigetaro Iwatsu; Yasuhide Nishida; Toru Takeda

doi:10.1117/12.137565

13 August 1992 Higher capacity optical disk subsystem using a sampled servo format

Shigetaro Iwatsu, Yasuhide Nishida, Toru Takeda

Proceedings Volume 1663, Optical Data Storage; (1992) https://doi.org/10.1117/12.137565
Event: Optical Data Storage Topical Meeting, 1992, San Jose, CA, United States

Abstract

A narrower track pitch for magneto-optical recording is evaluated by simulation and experiment for a higher-capacity disk subsystem. This experimental disk subsystem uses a sampled servo format with currently available optical components. The simulation estimates the recording track pitch limit for conventional laser wavelengths of 780 nm, and the effects of narrower track pitch recording is examined in actual sampled servo format disks. The reproduced signals are evaluated from the jitter in the time domain, and erase characteristics are evaluated from the decrease in signal amplitude. A track pitch of 1.0 micrometers is shown feasible by the experimental results if the recording pulse waveform is optimized and a pulsed erase method is used to reduce cross-erase.

Citation Download Citation

Shigetaro Iwatsu, Yasuhide Nishida, and Toru Takeda "Higher capacity optical disk subsystem using a sampled servo format", Proc. SPIE 1663, Optical Data Storage, (13 August 1992); https://doi.org/10.1117/12.137565

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