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We split each stage of back-propagation into a linear and a nonlinear part in parallel. We show by simulation and experiment that negligible performance degradation is achieved with half implementation complexity by baud-rate nonlinear compensation.
We transmit 198×100G pre-filtered PDM-RZ-QPSK channels with 400% spectral efficiency over 6,860 km. We also show that 100G coherent nonlinear performance scales differently with distance on uncompensated dispersion maps than expected from direct-detection transmission.
We compare the performance of coherent binary-phase-shift-keying and incoherent differential-binary-phase-shift-keying formats in linear and nonlinear 40-Gb/s systems. We show that intra-channel nonlinear interactions severely degrade the coherent binary-phase-shift-keying performance in highly nonlinear systems
We successfully conducted a 96/spl times/10 Gb/s RZ-DPSK field trial over an installed 13,100 km optical undersea path with more than 3 dB FEC margin, including channels with >13,000 ps/nm dispersion. The performance was further improved 1-2 dB by adding prechirp.
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