Abstract
We numerically and experimentally assessed novel optical nonlinear compensation systems and modified field-intensity averaging digital back propagation (mFIA-DBP). mFIA-DBP achieves a higher performance than DBP with lower computational complexity. For the 50 Gbaud-DP-16QAM system in the simulation, a higher performance was obtained by mFIA-DBP with one steps/span (StPS) over DBP with 2StPS. A comparison of the computational complexity in terms of the number of real multiplications shows that mFIA-DBP can compensate for the signal nonlinearity after a 4000 km transmission with 66.5% of the DBP. We confirmed the superior performance of mFIA-DBP in the high-power range and showed that this trend was consistent in experiments with the simulations.