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Digital nonlinearity compensation in high-capacity optical communication systems considering signal spectral broadening effect
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Xu, Tianhua, Karanov, Boris, Shevchenko, Nikita A., Lavery, Domaniç, Liga, Gabriele, Killey, Robert I. and Bayvel, Polina (2017) Digital nonlinearity compensation in high-capacity optical communication systems considering signal spectral broadening effect. Scientific Reports, 7 (1). 12986. doi:10.1038/s41598-017-12614-x ISSN 2045-2322.
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Official URL: http://dx.doi.org/10.1038/s41598-017-12614-x
Abstract
Nyquist-spaced transmission and digital signal processing have proved effective in maximising the spectral efficiency and reach of optical communication systems. In these systems, Kerr nonlinearity determines the performance limits, and leads to spectral broadening of the signals propagating in the fibre. Although digital nonlinearity compensation was validated to be promising for mitigating Kerr nonlinearities, the impact of spectral broadening on nonlinearity compensation has never been quantified. In this paper, the performance of multi-channel digital back-propagation (MC-DBP) for compensating fibre nonlinearities in Nyquist-spaced optical communication systems is investigated, when the effect of signal spectral broadening is considered. It is found that accounting for the spectral broadening effect is crucial for achieving the best performance of DBP in both single-channel and multi-channel communication systems, independent of modulation formats used. For multi-channel systems, the degradation of DBP performance due to neglecting the spectral broadening effect in the compensation is more significant for outer channels. Our work also quantified the minimum bandwidths of optical receivers and signal processing devices to ensure the optimal compensation of deterministic nonlinear distortions.
Item Type: | Journal Article | ||||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
Library of Congress Subject Headings (LCSH): | Optical fiber communication, Signal processing -- Digital techniques, Nonlinear optics | ||||||
Journal or Publication Title: | Scientific Reports | ||||||
Publisher: | Nature Publishing Group | ||||||
ISSN: | 2045-2322 | ||||||
Official Date: | 11 October 2017 | ||||||
Dates: |
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Volume: | 7 | ||||||
Number: | 1 | ||||||
Article Number: | 12986 | ||||||
DOI: | 10.1038/s41598-017-12614-x | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
Date of first compliant deposit: | 16 October 2017 | ||||||
Date of first compliant Open Access: | 16 October 2017 | ||||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC), Marie Curie Project | ||||||
Grant number: | EP/J017582/1 (EPSRC), 676448/H2020-MSCA-ITN-2015 (Marie Curie Project) | ||||||
Version or Related Resource: | IEEE invited proceeding paper for Keynote talk in [IEEE] Advances in Wireless and Optical Communications (RTUWO) 2017 conference |
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