Edge detection in phase-change optical data storage

Chubing Peng, M. Mansuripur, W. M. Kim, S. G. Kim

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Abstract

A direct mark edge detection scheme for readout in phase-change optical disk systems is described. The medium for edge detetection must be optimized to have a 90° phase difference between the amorphous mark and the crystalline space. Theoretical analysis and numerical simulation have shown that the readout signal using mark edge detection is as good as that using conventional detection of reflectivity for long marks and superior for short marks. Noise level at the output of differential edge detection is lower than that at the output of conventional detection. We also show experimental results that confirm these predictions.

Original languageEnglish (US)
Pages (from-to)2088-2090
Number of pages3
JournalApplied Physics Letters
Volume71
Issue number15
DOIs
StatePublished - Oct 13 1997

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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