Modulation format dependence of digital nonlinearity compensation performance in optical fibre communication systems

T. Xu, N.A. Shevchenko, D. Lavery, D. Semrau, G. Liga, A. Alvarado, R.I. Killey, P. Bayvel

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The relationship between modulation format and the performance of multi-channel digital back-propagation (MC-DBP) in ideal Nyquist-spaced optical communication systems is investigated. It is found that the nonlinear distortions behave independent of modulation format in the case of full-field DBP, in contrast to the cases of electronic dispersion compensation and partial-bandwidth DBP. It is shown that the minimum number of steps per span required for MC-DBP depends on the chosen modulation format. For any given target information rate, there exists a possible trade-off between modulation format and back-propagated bandwidth, which could be used to reduce the computational complexity requirement of MC-DBP.
Original languageEnglish
Pages (from-to)3311-3326
Number of pages16
JournalOptics Express
Issue number4
Publication statusPublished - 20 Feb 2017

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