Coherent 100G Nonlinear Compensation with Single-Step Digital Backpropagation

M. Secondini, Simon Rommel, F. Fresi, E. Forestieri, G. Meloni, L. Poti

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Abstract

Enhanced-SSFM digital backpropagation (DBP) is experimentally demonstrated and compared to conventional DBP. A 112 Gb/s PM-QPSK signal is transmitted over a 3200 km dispersion-unmanaged link. The intradyne coherent receiver includes single-step digital backpropagation based on the enhancedSSFM algorithm. In comparison, conventional DBP requires twenty steps to achieve the same performance. An analysis of the computational complexity and structure of the two algorithms reveals that the overall complexity and power consumption of DBP are reduced by a factor of 16 with respect to a conventional implementation, while the computation time is reduced by a factor of 20. As a result, the proposed algorithm enables a practical and effective implementation of DBP in real-time optical receivers, with only a moderate increase of the computational complexity, power consumption, and latency with respect to a simple feed-forward equalizer for dispersion compensation.
Original languageEnglish
Title of host publicationProceedings of the Optical Networks Design and Modelling (ONDM) Conference
Number of pages5
Publication date2015
Publication statusPublished - 2015
Externally publishedYes
Event19th International Conference on Optical Networks Design & Modelling - Pisa, Italy
Duration: 11 May 201514 May 2015
Conference number: 19

Conference

Conference19th International Conference on Optical Networks Design & Modelling
Number19
CountryItaly
CityPisa
Period11/05/201514/05/2015

Keywords

  • Fiber-optic systems
  • Fiber nonlinearity
  • Digital backpropagation

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