Flying head read/write characteristics using a monolithically integrated laser diode/photodiode at a wavelength of 1.3 um

Hiro Ukita; Yoshitada Katagiri; Hiroshi Nakada

doi:10.1117/12.45950

1 July 1991 Flying head read/write characteristics using a monolithically integrated laser diode/photodiode at a wavelength of 1.3 μm

Hiro Ukita, Yoshitada Katagiri, Hiroshi Nakada

Author Affiliations +

Proceedings Volume 1499, Optical Data Storage '91; (1991) https://doi.org/10.1117/12.45950
Event: Optical Data Storage, 1991, Colorado Springs, CO, United States

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.

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Hiro Ukita, Yoshitada Katagiri, and Hiroshi Nakada "Flying head read/write characteristics using a monolithically integrated laser diode/photodiode at a wavelength of 1.3 μm", Proc. SPIE 1499, Optical Data Storage '91, (1 July 1991); https://doi.org/10.1117/12.45950

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