Nonlinear Coherent Optical Systems in the Presence of Equalization Enhanced Phase Noise

Equalization enhanced phase noise (EEPN) occurs due to the interplay between laser phase noise and electronic dispersion compensation (EDC) module. It degrades significantly the performance of uncompensated long-haul coherent optical fiber communication systems. In this work, a general expression ac...

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Bibliographic Details
Published in:Journal of lightwave technology 2021-07, Vol.39 (14), p.4646-4653
Main Authors: Jin, Cenqin, Shevchenko, Nikita A., Li, Zhe, Popov, Sergei, Chen, Yunfei, Xu, Tianhua
Format: Article
Language:English
Subjects:
Communications systems
Compensation
digital nonlinearity compensation
Dispersion
electronic dispersion compensation
Equalization
equalization enhanced phase noise
Gaussian noise model
Laser noise
laser phase noise
Mathematical models
Noise
Nonlinearity
Optical communication
Optical distortion
Optical fiber communication
Optical fibers
Optical noise
Optical polarization
Performance degradation
Performance evaluation
Phase noise
Random noise
Signal to noise ratio
Wave division multiplexing
Wavelength division multiplexing
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Summary:Equalization enhanced phase noise (EEPN) occurs due to the interplay between laser phase noise and electronic dispersion compensation (EDC) module. It degrades significantly the performance of uncompensated long-haul coherent optical fiber communication systems. In this work, a general expression accounting for EEPN is presented based on Gaussian noise model to evaluate the performance of multi-channel optical communication systems using EDC and digital nonlinearity compensation (NLC). The nonlinear interaction between the signal and the EEPN is analyzed. Numerical simulations are carried out in nonlinear Nyquist-spaced wavelength division multiplexing (WDM) coherent transmission systems. Significant performance degradation due to EEPN in the cases of EDC and NLC are observed, with and without the consideration of transceiver (TRx) noise. The validation of the analytical approach has been done via split-step Fourier simulations. The maximum transmission distance and the laser linewidth tolerance are also estimated to provide important insights into the impact of EEPN.
ISSN:0733-8724
1558-2213
1558-2213
DOI:10.1109/JLT.2021.3076067