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

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 (20 x 80 km) with no inline compensation...

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Bibliographic Details
Published in:Optics express 2011-05, Vol.19 (10), p.9453-9460
Main Authors: Rafique, Danish, Mussolin, Marco, Forzati, Marco, Mårtensson, Jonas, Chugtai, Mohsan N, Ellis, Andrew D
Format: Article
Language:English
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Summary: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 (20 x 80 km) 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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.19.009453