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Transmission of 96 ,\times, 100-Gb/s Bandwidth-Constrained PDM-RZ-QPSK Channels With 300% Spectral Efficiency Over 10610 km and 400% Spectral Efficiency Over 4370 km

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10 Author(s)
Jin-Xing Cai ; Tyco Electronics Subsea Communications LLC, Eatontown, NJ, USA ; Yi Cai ; Carl R. Davidson ; Dmitri G. Foursa
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We demonstrated that simple pre-filtering at the transmitter to constrain the channel bandwidth together with a maximum a posteriori probability (MAP) detection algorithm can significantly improve spectral efficiency (SE). 96 × 100-Gb/s bandwidth-constrained polarization-division-multiplexing return- to-zero-QPSK channels were transmitted with 300% SE over 10 610 km using 52-km spans of 150-μ m 2 fiber and simple single-stage erbium-doped fiber amplifiers without any Raman amplification. We also achieved 400% SE over 4370 km using similar techniques.

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Journal of Lightwave Technology  (Volume:29 ,  Issue: 4 )