Experimental demonstration of fiber nonlinearity mitigation in a WDM multi-subcarrier coherent optical system

Thanks to the use of a digital multi-subcarrier architecture, we experimentally demonstrate a maximum reach increase of 11% for a 19x128Gbit/s PM-QPSK WDM comb with respect to an equivalent single-subcarrier system, achieving 14,100-km transmission over PSCF fiber with EDFA-only amplificatio