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Previous investigations have revealed that the impairments of the cross-phase modulation (XPM) in dense wavelength-division multiplexing (DWDM) systems include two aspects: the XPM-induced phase noise and the XPM-induced polarization scattering. Such XPM phenomena are strongly dependent on the transmission system configurations and are nonintuitive. In this paper, a simple fiber model is proposed...
We experimentally demonstrate interplay between PMD and nonlinearity in 112 Gb/s DP-QPSK signal transmission with 10.7 Gb/s NRZ neighbors can have both positive and negative impact depending on channel spacing and fiber launched power.
Impact of PMD is evaluated on nonlinear mitigation algorithm. While the backpropagation showed consistent improvement regardless of PMD, the best performance was found under different PMD conditions depending on fiber input power and channel spacing.
Dependencies on segment number, dispersion map, and fibre launched power were investigated experimentally and numerically. Uncompensated 25 spans standard SMF link can enjoy net Q gain of 1.7 dB with 25 segments compensation.
XPM impairments on 43 Gb/s single-polarization and dual-polarization RZ-DQPSK signals were compared under co-propagation of 11.1 Gb/s NRZ channels with direct-detection. The higher symbol rate, single-polarization format, showed a larger tolerance than the dual-polarization case.
We experimentally investigate the nonlinear impairments on 43 Gb/s RZ-DQPSK signals with direct detection and coherent receivers in a hybrid 10 G/40 G DWDM transmission over NZ-DSF with 50 GHz channel spacing.
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