Coherent optical transmission at 40 and 100 Gbps over 1000 km of DCF-free G.652 and G.655 fibre infrastructure

We experimentally compare the performances of 40 Gbps DP-BPSK, 40 Gbps DP-QPSK and 100 Gbps DP-QPSK modulation formats over 10×100 km of DCF-free transmission lines using either G.652 or G.655 fibres.