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Updated: Apr 18, 2026

Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
Experimental and numerical evaluation of inter-core differential mode delay characteristic of weakly-coupled
Abstract:
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.
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