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Application of Nonlinear MLSE Combined with FFE in 40Gbit/s Pol-Mux RZ-DQPSK Optical Communication System

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Abstract

Compared to other digital equalizers, MLSE (maximum likelihood sequence estimator) equalizer seem to be the most promising candidate solution to mitigate impairments caused by CD, PMD and fiber’s nonlinearity. A novel MLSE equalizer technology combined with FFE based on nonlinear Volterra theory is investigated, which shows superior performance for joint compensation of all distortion effects in uncompensated 40Gbit/s Pol-Mux RZ-DQPSK optical transmission system. The receiver can achieve a long haul transmission with 280 km without any optical dispersion compensation.

© 2011 Optical Society of America

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