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Multicore fibers and few-mode fibers have the potential to realize dense-space-division multiplexing systems. Several dense-space-division multiplexing system transmission experiments over multicore fibers and few-mode fibers have been demonstrated so far. Multicore fibers, including recent results by our group, are reviewed in this paper.
Few-mode multicore fiber (FM-MCF) has the potential to improve the transmission capacity of a fiber drastically. Challenges in designing FM-MCF and characteristics of our fabricated FM-MCF for highly dense space-division multiplexing are reviewed.
A design concept of few-mode multi-core fiber is presented. A four-core fiber that supports two LP modes with large effective area (Aeff) larger than 110 µm2 realizes the highest relative core multiplicity factor of 11.7.
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