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Amplification schemes and multi-channel DBP for unrepeatered transmission

AutorGaldino, L.; Tan, M.; Alvarado, A.; Lavery, D.; Rosa, Pawel ; Maher, R.; Ania Castañón, Juan Diego ; Harper, P.; Makovejs, S.; Thomsen, B.C.; Bayvel, P.
Palabras claveCoherent detection
Achievable information rates
Forward error correction (FEC)
Optical fibre communication
Raman amplification
Unrepeatered transmission.
Fecha de publicación22-ene-2016
EditorInstitute of Electrical and Electronics Engineers
CitaciónJournal of Lightwave Technology 34: 2221-2227 (2016)
ResumenThe 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.
Descripción7 págs.; 7 figs.; 2 tabs. ; INSPEC Accession Number: 15901947
Versión del editorhttp://doi.org/10.1109/JLT.2016.2521002
URIhttp://hdl.handle.net/10261/146335
DOI10.1109/JLT.2016.2521002
Identificadoresdoi: 10.1109/JLT.2016.2521002
issn: 0733-8724
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