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By pairing the mid and edge sub-bands of each channel, the penalty due to inter-channel-interference can be mitigated for a superchannel. Experimental results show that the proposed method offers 1.5-dB Q2 improvement after 3840-km transmission with 1GHz channel overlap.
We experimentally demonstrate mid-span spectral inversion (MSSI) of a Nyquist wavelength-division multiplexing (N-WDM) 526-Gb/s 16-QAM superchannel over an 800-km link. MSSI improves the robustness of blind carrier phase recovery in the nonlinearity-limited region.
We experimentally demonstrate 16.77-Tb/s multichannel Nyquist WDM using multiple subchannels per modulator to allow optimization of baud rate and nonlinear performance. After 400-km transmission, the 257×65.3-Gb/s bands had an average BER of 2.3×10−3.
We propose and experimentally demonstrate a novel frequency-domain blind equalizer based on the multi-modulus algorithm for the 16 QAM coherent optical system. The algorithm is shown to have good performance over a long transmission distance.
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