Open AccessExperimental and numerical evaluation of inter-core differential mode delay characteristic of weakly-coupled multi-core fiber
Author(s) -
Taiji Sakamoto,
Takahide Mori,
Masaki Wada,
Takashi Yamamoto,
Takashi Matsui,
Kazuhide Nakajima,
Fujio Yamamoto
Publication year - 2014
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.22.031966
Subject(s) - core (optical fiber) , crosstalk , optics , twist , materials science , optical fiber , physics , mathematics , geometry
We investigated the inter-core differential mode delay (DMD) characteristic of a weakly-coupled homogeneous multi-core fiber with a view to utilizing inter-core crosstalk compensation with MIMO processing. We confirmed experimentally that the bend induced inter-core DMD is lower than the simulated results, which we expected owing to the twist of the fiber. We also revealed numerically that the refractive index profile variation of each core greatly increases inter-core DMD. Finally, we conducted a 4 × 4 MIMO transmission experiment using a weakly-coupled 4-core fiber and successfully compensated for the inter-core crosstalk.