Apparatus and method for monitoring signal quality of a modulated optical signal
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United States of America Patent
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Aug 8, 2017
Grant Date -
Apr 21, 2016
app pub date -
Oct 20, 2014
filing date -
Oct 20, 2014
priority date (Note) -
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Abstract
A transmitter with at least one optical modulator adapted to modulate the optical signal output by a laser source to generate a modulated optical signal, wherein the optical signal output by the laser source is tapped and supplied to a monitoring circuit comprising an optical front end configured to select signal components of the tapped modulated optical signal and to convert the selected signal components of the tapped modulated optical signal into analog signals, and comprising at least one analog-to-digital converter, ADC, adapted to perform equivalent-time sampling of the analog signals to provide digital signals processed by a processing unit to monitor signal quality of the modulated optical signal.
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