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Multicore fibers (MCFs) are expected as a good candidate for overcoming the capacity limit of a current optical communication system. This paper describes the recent progress on the MCFs for space-division multiplexing to be utilized in future large capacity long-distance transmission systems. Tradeoff issue between low crosstalk and high core density in MCFs is presented and prospect of large-space...
Fused taper type fan-in/fan-out device with small MFD is developed for multicore EDF. Almost similar MFD and high accuracy core arrangement as multicore EDF are achieved by using high Δ single-core fiber in elongation process.
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