Volterra-Based Reconfigurable Nonlinear Equalizer for Coherent OFDM

Abstract
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.
Funding Information
  • European Commission through FP7 ICT Projects DISCUS (318137)
  • Fox-C (318415)
  • Engineering and Physical Sciences Research Council (EP/J017582/1-UNLOC)
  • Royal Society (WM120035-TEST)