Optical labeling system using FSK for label encoding and PPM for payload modulation

Xu, Lei and Wang, Ting and Glesk, Ivan and Prucnal, Paul R.; (2005) Optical labeling system using FSK for label encoding and PPM for payload modulation. In: 2005 Conference on Lasers and Electro-Optics, CLEO. UNSPECIFIED, GBR, pp. 1049-1051. ISBN 9781557527950

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Abstract

We demonstrate an optical labeling system using frequency-shift-keying (FSK) for label encoding and pulse-position-modulation (PPM) for payload modulation. The scheme relieves the extinction-ratio impairment in systems using FSK for labeling and on-off-keying for payload modulation.