Semi-analytical modelling of linear mode coupling in few-mode fibers

Filipe M. Ferreira, Christian S. Costa, Stylianos Sygletos, Andrew D. Ellis

Research output: Contribution to journalArticlepeer-review


This paper reviews and extends a method for the semi-analytical solution of the coupled linear differential equations that describe the linear mode coupling arising in few-mode fibers due to waveguide imperfections. The semi-analytical solutions obtained proved to be accurate when compared to numerical solution methods. These solutions were integrated into a multi-section model with split-steps for mode dispersion and mode coupling. Simulations using this model matched the analytical predictions for the statistics of group-delays in few-mode fiber links, considering different coupling regimes with and without mode delay management.
Original languageEnglish
Pages (from-to)4011 - 4022
Number of pages12
JournalJournal of Lightwave Technology
Issue number18
Early online date19 Jul 2017
Publication statusPublished - 15 Sept 2017

Bibliographical note

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Funding: European Union (Grants 619732-INSPACE, 654809-HSPACE, and 659950-INVENTION); and EPSRC (Grant EP/L000091/1-PEACE).


  • couplings
  • optical fiber dispersion
  • optical fiber theory
  • dielectrics
  • mathematical model
  • numerical models
  • analytical models
  • mode-division multiplexing
  • multimode fiber
  • few-mode fiber
  • linear mode coupling


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