Edge detection in phase-change optical data storage

Author

Chubing Peng ; Mansuripur, M.

Author_Institution

Opt. Sci. Center, Arizona Univ., Tucson, AZ, USA

fYear

1997

fDate

7-9 April 1997

Firstpage

32

Lastpage

33

Abstract

We introduce a new readout scheme, called edge detection scheme, for phase-change systems. A single split detector is used to detect the intensity of the reflected beam in the far field, and the readout signal, which relies on diffraction from mark boundaries, is the difference signal of the split-detector. We derive the magnitude of the readout signal for edge detection, clarify the effect of phase on the read signal, and compare noise levels at the output of readout systems using edge detection and sum detection.

Keywords

edge detection; optical disc storage; optical noise; optical signal detection; reflectivity; difference signal; edge detection readout scheme; far field; mark boundary diffraction; noise levels; phase effect; phase-change optical data storage; readout signal magnitude; reflected beam intensity detection; single split detector; sum detection; Amorphous materials; Crystallization; Diffraction; Image edge detection; Lenses; Memory; Optical reflection; Phase detection; Reflectivity; Signal detection;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Data Storage Topical Meeting, 1997. ODS. Conference Digest

Conference_Location

Tucson, AZ, USA

Print_ISBN

0-7803-3885-5

Type

conf

DOI

10.1109/ODS.1997.606101

Filename

606101