Multicore optical fiber
AssigneeSumitomo Electric Industries, Ltd.
InventorsHirotaka Sakuma, Takahiro Suganuma, Tetsuya Hayashi, Takemi Hasegawa
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Abstract
An MCF includes a plurality of cores each extending in a direction along a central axis and a cladding covering each of the plurality of cores. The cladding includes a low refractive index barrier. The low refractive index barrier includes an alkali metal element. A relative refractive index of the low refractive index barrier is lower than an average value of a relative refractive indices of the cladding overall. The core interval is set such that a total sum of the power coupling coefficients between a specific core among the plurality of cores and each of all remaining cores is 2.3×10−4/km or less.
Claims18
A multicore optical fiber comprising:
- a plurality of cores each extending in a direction along a central axis;
- a low refractive index barrier including an alkali metal element;
- and
- a cladding covering each of the plurality of cores,
- wherein the low refractive index barrier is positioned within the cladding, and the low refractive index barrier has a relative refractive index lower than an average value of relative refractive indices of the cladding overall, and
- a core interval is set such that a total sum of power coupling coefficients between a specific core among the plurality of cores and each of all remaining cores is 2.3×10−4/km or less.
Dependencies are inferred from the claim text.