A reconfigurable nonlinear equalizer (RNLE) based on inverse Volterra series transfer function is proposed for dual-polarization (DP) and multiband coherent optical orthogonal frequency-division multiplexing (OFDM) signals. It is shown that the RNLE outperforms by 2 dB the linear equalization in a 260-Gb/s DP-OFDM system at 1500 km. The RNLE improves the tolerance to inter/intraband nonlinearities, being independent on polarization tributaries, modulation format, signal bit rate, subcarrier number, and distance.
Bibliographical noteFunding: European Commission (FP7 ICT Projects DISCUS - Grant 318137 - and FOX-C - Grant 318415); EPSRC (Grant EP/J017582/1-UNLOC); and the Royal Society under Grant WM120035-TEST.
Giacoumidis, E., Aldaya, I., Jarajreh, M. A., Tsokanos, A., Le, S. T., Farjady, F., Jaouën, Y., Ellis, A. D., & Doran, N. J. (2014). Volterra-based reconfigurable nonlinear equalizer for coherent OFDM. IEEE Photonics Technology Letters, 26(14), 1383-1386. https://doi.org/10.1109/LPT.2014.2321434