Optical signal-to-noise ratio (OSNR) monitoring and measurement in optical communications sytems
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United States of America Patent
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Dec 19, 2017
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app pub date -
Jun 12, 2015
filing date -
Jun 12, 2014
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Abstract
Disclosed are methods for monitoring and measuring Optical Signal-To-Noise Ratios in optical communications systems. One exemplary method involves intentionally inserting zero power symbols into an optical signal stream such that those periods of time in which only zero power symbols are transmitted may be detected and compared with periods of time in which signals modulated with information including both signal and noise are detected such that the OSNR may be determined.
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