Direct-Detection Based Frequency-Resolved I/Q Imbalance Calibration for Coherent Optical Transmitters
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Authors
Xi Chen
Xi Chen•Di Che
Published
January 1, 2021
Abstract
We propose a method for calibrating the frequency dependent I/Q imbalance in coherent optical transmitters. We demonstrate that with our calibration, the OSNR penalty of a 58-GBaud 256-QAM signal can be reduced by 2.5 dB.
