Rafique, D,Mussolin, M,Forzati, M,Martensson, J,Chugtai, MN,Ellis, AD;

2011

January

Optics Express

Compensation of intra-channel nonlinear fibre impairments using simplified digital back-propagation algorithm

Validated

()

TRANSMISSION

19

9453

9460

We investigate a digital back-propagation simplification method to enable computationally-efficient digital nonlinearity compensation for a coherently-detected 112 Gb/s polarization multiplexed quadrature phase shifted keying transmission over a 1,600 km link (20x80km) with no inline compensation. Through numerical simulation, we report up to 80% reduction in required back-propagation steps to perform nonlinear compensation, in comparison to the standard back-propagation algorithm. This method takes into account the correlation between adjacent symbols at a given instant using a weighted-average approach, and optimization of the position of nonlinear compensator stage to enable practical digital back-propagation. (C) 2011 Optical Society of America