title: Spectrally shaped DP-16QAM super-channel transmission with multi-channel digital back-propagation.
abstract: The achievable transmission capacity of conventional optical fibre communication systems is limited by nonlinear distortions due to the Kerr effect and the difficulty in modulating the optical field to effectively use the available fibre bandwidth. In order to achieve a high information spectral density (ISD), while simultaneously maintaining transmission reach, multi-channel fibre nonlinearity compensation and spectrally efficient data encoding must be utilised. In this work, we use a single coherent super-receiver to simultaneously receive a DP-16QAM super-channel, consisting of seven spectrally shaped 10GBd sub-carriers spaced at the Nyquist frequency. Effective nonlinearity mitigation is achieved using multi-channel digital back-propagation (MC-DBP) and this technique is combined with an optimised forward error correction implementation to demonstrate a record gain in transmission reach of 85%; increasing the maximum transmission distance from 3190 km to 5890 km, with an ISD of 6.60 b/s/Hz. In addition, this report outlines for the first time, the sensitivity of MC-DBP gain to linear transmission line impairments and defines a trade-off between performance and complexity.
authors: Optical Networks Group, University College London, Torrington Place, London WC1E 7JE, United Kingdom.
authors: Robert
authors: R
authors: Maher
authors: Optical Networks Group, University College London, Torrington Place, London WC1E 7JE, United Kingdom.
authors: Tianhua
authors: T
authors: Xu
authors: Optical Networks Group, University College London, Torrington Place, London WC1E 7JE, United Kingdom.
authors: Lidia
authors: L
authors: Galdino
authors: 1] Optical Networks Group, University College London, Torrington Place, London WC1E 7JE, United Kingdom [2] NEC Corporation, Abiko, Japan.
authors: Masaki
authors: M
authors: Sato
authors: Optical Networks Group, University College London, Torrington Place, London WC1E 7JE, United Kingdom.
authors: Alex
authors: A
authors: Alvarado
authors: Optical Networks Group, University College London, Torrington Place, London WC1E 7JE, United Kingdom.
authors: Kai
authors: K
authors: Shi
authors: Optical Networks Group, University College London, Torrington Place, London WC1E 7JE, United Kingdom.
authors: Seb J
authors: SJ
authors: Savory
authors: Optical Networks Group, University College London, Torrington Place, London WC1E 7JE, United Kingdom.
authors: Benn C
authors: BC
authors: Thomsen
authors: Optical Networks Group, University College London, Torrington Place, London WC1E 7JE, United Kingdom.
authors: Robert I
authors: RI
authors: Killey
authors: Optical Networks Group, University College London, Torrington Place, London WC1E 7JE, United Kingdom.
authors: Polina
authors: P
authors: Bayvel
references: Opt Express. 2007 Mar 5;15(5):2120-6
references: 19532448
references: Opt Express. 2012 Dec 10;20(26):B445-51
references: 23262886
references: Opt Express. 2014 Jan 27;22(2):1796-805
references: 24515188