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Study of performance-monitoring method using asynchronous code determination

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Abstract

Feature Issue on Optical Performance Monitoring (OPM). A method for asynchronous code determination (ACD) is one of the most promising ways of monitoring signal quality in transparent networks, since it does not require any clock recovery circuits. In the case of the conventional ACD scheme using the asynchronously measured probability-density function (PDF) of the inside of an eye-diagram, the PDF often becomes distant from Gaussian distribution, owing to cross points of the received signal eye-diagram, which is undesired. In contrast, when we use the asynchronously measured PDF of the outside of the eye-diagram, the above-mentioned PDF distortion problem is by nature lessened, and this is useful for stable monitoring of signal quality. We report the results of the performance-monitoring scheme, using the asynchronously measured PDF of the outside of an eye-diagram.

© 2003 Optical Society of America

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