Multi-span digital non-linear compensation for dual-polarization quadrature phase shift keying long-haul communication systems

Asif, Rameez, Lin, Chien Yu, Holtmannspoetter, Michael and Schmauss, Bernhard (2012) Multi-span digital non-linear compensation for dual-polarization quadrature phase shift keying long-haul communication systems. Optics Communications, 285 (7). pp. 1814-1818. ISSN 0030-4018

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We have numerically investigated a method to reduce the complexity of the digital backward propagation algorithm (DBP). A filtered logarithmic step-size based split-step Fourier method (SSFM) is investigated in this paper to digitally compensate chromatic dispersion (CD) and non-linearities (NL) in dual-polarization quadrature phase shift keying (DP-QPSK) systems. The algorithm was evaluated for coherently-detected multiple channel DP-QPSK system over un-compensated transmission links with diverse baud-rates i.e. 14 GBaud, 28 GBaud and 56 GBaud. The results depict efficient mitigation of CD and NL, therefore improving the non-linear threshold point (NLT) by 4 dB. Furthermore by implementing a low-pass-filter (LPF) in each DBP stage, the required number of DBP stages are significantly reduced (multi-span DBP) by 75%. The results delineate improved system performance of logarithmic step size based filtered DBP (FL-DBP) both in terms of efficiency and complexity which will be helpful in future deployment of DBP algorithm with real-time signal processing modules for non-linear compensation.

Item Type: Article
Additional Information: Funding Information: The authors gratefully acknowledge the funding of the Erlangen Graduate School in Advanced Optical Technologies (SAOT) by the German National Science Foundation (DFG) in the framework of the excellence initiative.
Uncontrolled Keywords: coherent receiver,digital backward propagation,dispersion,non-linearities,optical fiber communication,phase modulation,electronic, optical and magnetic materials,atomic and molecular physics, and optics,physical and theoretical chemistry,electrical and electronic engineering ,/dk/atira/pure/subjectarea/asjc/2500/2504
Faculty \ School: Faculty of Science > School of Computing Sciences
UEA Research Groups: Faculty of Science > Research Groups > Smart Emerging Technologies
Faculty of Science > Research Groups > Cyber Security Privacy and Trust Laboratory
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Depositing User: LivePure Connector
Date Deposited: 08 Sep 2022 09:30
Last Modified: 14 Mar 2023 08:34
DOI: 10.1016/j.optcom.2011.11.120

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