Field trial of real-time 80-λ×400-Gb/s single-carrier 128-GBd DP-QPSK transmission covering 12-THz C+L band over 2502-km terrestrial G.652.D fibre

We demonstrate a record of real-time 80-λ×400-Gb/s DP-QPSK field transmission over 2502-km terrestrial G.652.D fibre based on 6-THz C-band and 6-THz L-band EDFAs jointly with backward distributed Raman pumping in partial large-loss spans.