PDM-OFDM-32QAM WDM signals transmission over 4,200 km with nonlinear compensation and EDFA only amplification

Abstract

Employing multi-band digital backpropagation for nonlinearity compensation, we experimentally demonstrated eight 100-Gbit/s PDM-OFDM-32QAM DWDM transmission over 4,242 km in a 12.5 GHz frequency grid. It achieves the longest transmission distance using EDFA only amplification to date.