We experimentally demonstrate quality ()-factor enhancement in terms of fiber nonlinearity compensation of 16 quadrature amplitude modulation coherent optical orthogonal frequency-division multiplexing at 2000 km, using a nonlinear equalizer (NLE) based on artificial neural networks (ANN). Nonlinearity alleviation depends on escalation of the ANN training overhead and the signal bit rate, reporting -factor enhancement at , whereas a reduction of the number of ANN neurons annihilates the NLE performance. An enhanced performance by up to in -factor compared to the inverse Volterra-series transfer function NLE leads to a breakthrough in the efficiency of ANN.
© 2015 Optical Society of AmericaFull Article | PDF Article
3 November 2015: A correction was made to Fig. 6.
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