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

Jin, Cenqin; Shevchenko, Nikita A; Li, Zhe; Popov, Sergei; Chen, Yunfei; Xu, Tianhua; (2021) Nonlinear Coherent Optical Systems in the Presence of Equalization Enhanced Phase Noise. Journal of Lightwave Technology , 39 (14) pp. 4646-4653. 10.1109/JLT.2021.3076067. Green open access

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Abstract

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.

Type: Article
Title: Nonlinear Coherent Optical Systems in the Presence of Equalization Enhanced Phase Noise
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JLT.2021.3076067
Publisher version: https://doi.org/10.1109/JLT.2021.3076067
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Technology, Physical Sciences, Engineering, Electrical & Electronic, Optics, Telecommunications, Engineering, Optical distortion, Optical noise, Signal to noise ratio, Optical polarization, Laser noise, Dispersion, Phase noise, Optical fiber communication, digital nonlinearity compensation, Gaussian noise model, laser phase noise, electronic dispersion compensation, equalization enhanced phase noise, GN-MODEL, DIGITAL BACKPROPAGATION, PROPAGATION, COMPENSATION, TRANSMISSION, DISPERSION
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10176924
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