title: Compensation of intra-channel nonlinear fibre impairments using simplified digital back-propagation algorithm.
abstract: 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.
authors.affiliation: Photonics Systems Group, Tyndall National Institute and Department of Electrical Engineering/Physics, University College Cork, Dyke Parade, Prospect Row, Cork, Ireland. danish.rafique@tyndall.ie
authors.forename: Danish
authors.initials: D
authors.lastname: Rafique
authors.forename: Marco
authors.initials: M
authors.lastname: Mussolin
authors.forename: Marco
authors.initials: M
authors.lastname: Forzati
authors.forename: Jonas
authors.initials: J
authors.lastname: Mårtensson
authors.forename: Mohsan N
authors.initials: MN
authors.lastname: Chugtai
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Ellis