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Nonlinear compensation with DBP aided by memory polynomial

Gonçalves, JPFG ; Martins, C. M. ; Guiomar, F. P. ; Cunha, T.R. ; Pedro, J. C. ; Pinto, A. N. ; Lavrador, P.M.L.

Optics Express Vol. 24, Nº 26, pp. 30309 - 30316, December, 2016.

ISSN (print): 1094-4087
ISSN (online): 1094-4087

Journal Impact Factor: 3,488 (in 2014)

Digital Object Identifier:

Abstract
Using digital backpropagation (DBP) based on the split step Fourier method (SSFM) aided by a memory polynomial (MP) model, we demonstrate an improved DBP approach for fiber nonlinearity compensation. The proposed technique (DBP-SSFM&MP) is numerically validated and its performance and complexity are compared against the benchmark DBP-SSFM, considering a single-channel 336 Gb/s PM-64QAM transmission system. We demonstrate that the proposed technique allows to maintain the performance achieved by DBP-SSFM, while decreasing the required number of iterations, by over 60%. For a transmission length of 1600 km we obtain a complexity reduction gain of 50.7% in terms of real multiplications in comparison with the standard DBP-SSFM.