665 and 947b/s/Hz Ultra-highly Aggregate-Spectral-Efficient SDM/WDM Transmission over 6-Mode 19-Core Fibre Using DP-16QAM/64QAM Signals

665 and 947b/s/Hz ultra-highly aggregate spectral-efficient SDM transmission over 9.8km 6- mode 19-core fibre has been successfully demonstrated using 5.7-GHz-spaced 5-Gbaud DP-16QAM/64QAM Nyquist WDM signals with pre-emphasis-based MDL compensation and claddingpumped 6-mode pre-amplification.