Amplification schemes and multi-channel DBP for unrepeatered transmission


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.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: © 2016 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See standards/publications/rights/index.html for more information. Funding: EPSRC [UNLOC (EP/J017582/1)]; and National Council for Scientific and Technological Development (CNPQ-Brazil).
Uncontrolled Keywords: achievable information rates,coherent detection,forward error correction (FEC),optical fibre communication,Raman amplification,unrepeatered transmission,Atomic and Molecular Physics, and Optics
Publication ISSN: 0733-8724
Last Modified: 08 Jul 2024 07:23
Date Deposited: 19 May 2016 10:15
Full Text Link: http://ieeexplo ... rnumber=7389964
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2016-05-01
Published Online Date: 2016-01-21
Accepted Date: 2016-01-20
Submitted Date: 2015-09-22
Authors: Galdino, Lidia
Tan, Mingming (ORCID Profile 0000-0002-0822-8160)
Alvarado, Alex
Lavery, Domaniç
Rosa, Paweł
Maher, Robert
Ania-Castañón, Juan Diego
Harper, Paul (ORCID Profile 0000-0002-9495-9911)
Makovejs, Sergejs
Thomsen, Benn C.
Bayvel, Polina



Version: Published Version

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