Experimental Demonstration of Dual-polarisation Non-linear Frequency-division Multiplexed Transmission with b-Modulation

Dual-polarisation Nonlinear Frequency Division Multiplexing (DP-NFDM) transmission has been intensively investigated recently due to its potential of doubling the capacity in comparison to single polarisation NFDM systems. However, up to now, due to many challenges in design and practical implementation, demonstrated data rates of DP-NFDM transmission systems in experiments are still much lower than the record data rate of single polarisation NFDM transmissions (125 Gb/s). In this work, by employing the concept of b-modulation and developing effective digital signal processing (DSP), we have experimentally demonstrated for the first time a high capacity DP-NFDM transmission system, achieving a net data rate of 220 Gbps with spectral efficiency (SE) of 4 bits/s/Hz.