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Proceedings Paper

Flying head read/write characteristics using a monolithically integrated laser diode/photodiode at a wavelength of 1.3 um
Author(s): Hiro Ukita; Yoshitada Katagiri; Hiroshi Nakada
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Paper Abstract

A feasibility study is shown for an optical disk drive using an optically switched laser (OSL) flying head. This head consists of an AlN slider and 1.3-micrometers wavelength InGaAsP laser diode monolithically integrated with a photodiode. The laser diode has a taper-ridged waveguide on the top of the facet facing the recording medium. The disk consists of an SiN dielectric protective layer, an SbTe Ge recording medium, and 1.5-micrometers -track pitch sampled servo format pits on the glass substrate. The lensless near-field flying head gives excellent read/write performance and head/medium reliability: a high-quality readout SNR of 35 dB, stable write operation with 16 mW of laser power, and a lifetime of 4.4 X 108 passes under experimental room conditions.

Paper Details

Date Published: 1 July 1991
PDF: 15 pages
Proc. SPIE 1499, Optical Data Storage '91, (1 July 1991); doi: 10.1117/12.45950
Show Author Affiliations
Hiro Ukita, NTT Applied Electronics Labs. (Japan)
Yoshitada Katagiri, NTT Applied Electronics Labs. (Japan)
Hiroshi Nakada, NTT Applied Electronics Labs. (Japan)

Published in SPIE Proceedings Vol. 1499:
Optical Data Storage '91
James J. Burke; Thomas A. Shull; Nobutake Imamura, Editor(s)

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