Method and Apparatus for Monitoring Optical Signal-to-Noise Ratio
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United States of America Patent
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Oct 17, 2016
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Apr 17, 2014
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Abstract
A method and an apparatus for monitoring an optical signal-to-noise ratio (OSNR) is provided. The method includes coupling a to-be-tested signal with a particular noise signal, to obtain a composite signal, where the particular noise signal is a noise signal that makes an OSNR of a signal of a to-be-tested channel in the composite signal be within a preset OSNR range. The method also includes determining an OSNR of the signal of the to-be-tested channel in the to-be-tested signal according to an optical spectrum of the composite signal and a power of the particular noise signal.
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