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We experimentally investigate idealized digital nonlinearity compensation in a 9-channel DWDM system. A Q2-factor gain of 2-dB for single-channel transmission is reduced to 0.1-dB in DWDM operation and recovers to 0.8-dB for nonlinearity compensation across all channels.
We present fiber-nonlinearity-tolerant transmission of polarization-division multiplexed binary phase-shift keying (PDM-BPSK) through a nonlinear noise squeezing (NLNS) effect that is achieved by optimized digital electronic dispersion precompensation. With the improved nonlinear tolerance, a 406.6-Gb/s superchannel consisting of eight 37.5-GHz-spaced 32-Gbaud Nyquist-filtered PDM-BPSK signals is...
We review the concept, experimental demonstrations, and performance tradeoffs of phase-conjugated twin waves for fiber nonlinearity mitigation. The implications of the underlying physics for perturbation-based fiber nonlinearity compensation are also discussed.
We demonstrate and study significant improvements in the measured bit-error rates of 40-Gb/s signals distorted after passing through a single and a cascade of two semiconductor optical amplifiers by using a simple colorless optical equalizer.
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