Amplification schemes and multi-channel DBP for unrepeatered transmission
| Autor: | Juan Diego Ania-Castanon, Robert Maher, Paul Harper, Sergejs Makovejs, Lidia Galdino, Benn C. Thomsen, Polina Bayvel, Pawel Rosa, Alex Alvarado, Domanic Lavery, Mingming Tan |
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| Přispěvatelé: | European Commission, Signal Processing Systems, Information and Communication Theory Lab, Center for Wireless Technology Eindhoven |
| Rok vydání: | 2016 |
| Předmět: |
Optical fiber
Raman amplification 02 engineering and technology forward error correction (FEC) law.invention optical fibre communication Forward error correction (FEC) symbols.namesake 020210 optoelectronics & photonics Optics Optical fibre communication law Coherent detection unrepeatered transmission 0202 electrical engineering electronic engineering information engineering Stimulated emission Digital signal processing Physics Optical amplifier business.industry Bandwidth (signal processing) Unrepeatered transmission Atomic and Molecular Physics and Optics coherent detection Nonlinear system symbols Achievable information rates business Raman spectroscopy |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Journal of Lightwave Technology, 34(9), 2221-2227. IEEE/LEOS Journal of Lightwave Technology |
| ISSN: | 1590-1947 0733-8724 |
| Popis: | 7 págs.; 7 figs.; 2 tabs. ; INSPEC Accession Number: 15901947 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. The authors would like to thank Corning, Inc., for supplying the fibre used in this work. |
| Databáze: | OpenAIRE |
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