Maximizing Transmission Capacity of Superchannels using Rate-Adaptive FEC

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Peak channel capacity vs 4 combinations of FEC scheme and power allocation, for 10 spans of 80km NZDSF link with 3 subchannels

We investigated the use of per-channel rate-adaptive FEC for superchannels, in the presence of fiber nonlinearity, inter-channel interference, and power variations. We found 3-4% peak capacity and about 0.3dB nonlinear power threshold increase compared to the conventional method.