Optimum index profile of few-mode coupled multicore fibers for reducing the group delay spread | Zendy

Kazuki Yoshida | Zendy; Takeshi Fujisawa | Zendy; Takanori Sato | Zendy; Kunimasa Saitoh | Zendy

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Optimum index profile of few-mode coupled multicore fibers for reducing the group delay spread

Author(s) -

Kazuki Yoshida,

Takeshi Fujisawa,

Takanori Sato,

Kunimasa Saitoh

Publication year - 2019

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.27.016281

Subject(s) - multi core processor , optics , mode (computer interface) , modal , core (optical fiber) , modal dispersion , bending , group delay and phase delay , coupling (piping) , mode coupling , coupled mode theory , physics , optical fiber , refractive index , materials science , graded index fiber , telecommunications , computer science , fiber optic sensor , bandwidth (computing) , polymer chemistry , metallurgy , thermodynamics , operating system

We numerically investigate the group delay spread (GDS) characteristics in few-mode coupled multicore fibers (FM-CMCFs) in weak random-bending conditions by using a coupled-wave theory. We qualitatively show the modal coupling between modes in the intra- and the inter-mode group generated by bending. The results indicate that the modes of FM-CMCFs are less likely to couple with each other in weak random-bending conditions in contradiction to single-mode coupled multicore fibers. To resolve this problem, we demonstrate an optimum index profile and core pitch, where the GDS can be reduced even if the different mode groups do not couple strongly.

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