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.

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

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