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Proceedings Paper

Self-Coupled Optical Pickup (II) And Its Application
Author(s): Yoshinobu Mitsuhashi; Junichi Shimada; Shigeru Kogure; Yorihiko Sakai
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Paper Abstract

Our paper consist of two parts. First, we have demonstrated that the characteristics of a self-coupled optical pickup are remarkably improved by use of a newly-developed so-called incoherent laser diode made by Sharp, Servo signals for focusing are obtained by wobbling method with signal to noise ratio more than 30 dB. Second, we describe a simple real time method for sensitivity measurement of optical storage media utilizing a self-coupling effects of a GaAlAs laser diode. We have shown that we make clear the depend-ences of duration time in writing laser pulses and substrate materials on the sensitivity of a single tellurium film recording material.

Paper Details

Date Published: 25 September 1984
PDF: 8 pages
Proc. SPIE 0490, Applications of Optical Digital Data Disk Storage Systems, (25 September 1984); doi: 10.1117/12.943447
Show Author Affiliations
Yoshinobu Mitsuhashi, Electrotechnical Laboratory (Japan)
Junichi Shimada, Electrotechnical Laboratory (Japan)
Shigeru Kogure, Suwa Seikosha Co., Ltd. (Japan)
Yorihiko Sakai, Dai Nippon Printing Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 0490:
Applications of Optical Digital Data Disk Storage Systems
Marino G. Carasso; W. Michael Deese, Editor(s)

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