Methods and systems for optical performance monitoring
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United States of America Patent
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Jan 7, 2014
Grant Date -
Mar 27, 2008
app pub date -
Sep 27, 2006
filing date -
Sep 27, 2006
priority date (Note) -
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Abstract
A method and system to economically monitor an optical OOK signal that can detect perceptible changes in signal quality and identify the type of optical impairment causing the change. The invention requires a new and novel combination of known techniques to create an eye diagram of the transmitted pulse in a wavelength division multiplexing systems and then removing the noise from the eye diagram. Economy of operation is achieve by using asynchronous sampling techniques for generating the eye diagram. The resulting “cleaner” eye diagram is then analyzed to identify any changes in performance. In the preferred embodiment, the analysis is conducted on histograms generated from eye diagram, the histograms are computed at a number of points across the optical signal pulse period.
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