Transmission of 448-Gb/s dual-carrier POLMUX-16QAM over 1230 km with 5 flexi-grid ROADM passes

We show the compatibility of 448-Gb/s dual-carrier POLMUX-16QAM modulation with a 87.5-GHz flexi-grid channel spacing in the presence of cascaded optical filtering, enabling transmission over 1230 km and 5 ROADM passes with 4.8-b/s/Hz spectral efficiency

Advances in signal processing

We review the latest developments and challenges in the field of digital signal processing for state of the art and future optical coherent communications for 400Gb/s and beyon

Mode-division-multiplexed 3×112-Gb/s DP-QPSK transmission over 80-km few-mode fiber with inline MM-EDFA and blind DSP

We show transmission of a 3x112-Gb/s DP-QPSK mode-division-multiplexed signal up to 80km, with and without multi-mode EDFA, using blind 6x6 MIMO digital signal processing. We show that the OSNR-penalty induced by mode-mixing in the multi-mode EDFA is negligible