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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 39,
  • Issue 23,
  • pp. 7517-7528
  • (2021)

Near-Zero Modal-Dispersion (NEMO) Coupled-Core Multi-Core Fibers

Open Access Open Access

Abstract

Wepropose a design for coupled-core multi-core fibers that allows to achieve extremely low levels of modal dispersion. These fibers, which we dub NEar-zero MOdal-dispersion (NEMO) fibers, have an even number of cores regularly distributed on a circle, and the optimal design parameters follow from a simple condition independent of the number of cores. The modal-dispersion reduction trades off some of the fiber mode-mixing effectiveness, yet without compromising its beneficial property of mitigating nonlinear signal distortions. The semi-analytical tool developed for this study allows to effectively characterize the effect of various types of perturbations to the ideal fiber structure.

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