Self-Coupled Optical Pickup (II) And Its Application

Yoshinobu Mitsuhashi; Junichi Shimada; Shigeru Kogure; Yorihiko Sakai

doi:10.1117/12.943447

25 September 1984 Self-Coupled Optical Pickup (∏) And Its Application

Yoshinobu Mitsuhashi, Junichi Shimada, Shigeru Kogure, Yorihiko Sakai

Proceedings Volume 0490, Applications of Optical Digital Data Disk Storage Systems; (1984) https://doi.org/10.1117/12.943447
Event: Applications of Optical Digital Data Disk Storage Systems, 1984, Brussels, Belgium

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.

Citation Download Citation

Yoshinobu Mitsuhashi, Junichi Shimada, Shigeru Kogure, and Yorihiko Sakai "Self-Coupled Optical Pickup (∏) And Its Application", Proc. SPIE 0490, Applications of Optical Digital Data Disk Storage Systems, (25 September 1984); https://doi.org/10.1117/12.943447

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