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Amplification Schemes and Multi-Channel DBP for Unrepeatered Transmission

Galdino, L; Tan, M; Alvarado, A; Lavery, D; Rosa, P; Maher, R; Diego Ania-Castanon, J; ... Bayvel, P; + view all (2016) Amplification Schemes and Multi-Channel DBP for Unrepeatered Transmission. Journal Of Lightwave Technology , 34 (9) pp. 2221-2227. 10.1109/JLT.2016.2521002. Green open access

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Abstract

The performance of unrepeatered transmission of a seven Nyquist-spaced 10 GBd PDM-16QAM superchannel using full signal band coherent detection and multi-channel digital back propagation (MC-DBP) to mitigate nonlinear effects is analysed. For the first time in unrepeatered transmission, the performance of two amplification systems is investigated and directly compared in terms of achievable information rates (AIRs): 1) erbium-doped fibre amplifier (EDFA) and 2) second-order bidirectional Raman pumped amplification. The experiment is performed over different span lengths, demonstrating that, for an AIR of 6.8 bit/s/Hz, the Raman system enables an increase of 93 km (36 %) in span length. Further, at these distances, MC-DBP gives an improvement in AIR of 1 bit/s/Hz (to 7.8 bit/s/Hz) for both amplification schemes. The theoretical AIR gains for Raman and MC-DBP are shown to be preserved when considering low-density parity-check codes. Additionally, MC-DBP algorithms for both amplification schemes are compared in terms of performance and computational complexity. It is shown that to achieve the maximum MC-DBP gain, the Raman system requires approximately four times the computational complexity due to the distributed impact of fibre nonlinearity.

Type: Article
Title: Amplification Schemes and Multi-Channel DBP for Unrepeatered Transmission
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JLT.2016.2521002
Publisher version: http://dx.doi.org/10.1109/JLT.2016.2521002
Language: English
Additional information: Copyright © 2016 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications standards/publications/rights/index.html for more information.
Keywords: Achievable information rates, coherent detection, forward error correction (FEC), optical fibre communication, Raman amplification, unrepeatered transmission
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1480958
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