MULTICORE OPTICAL FIBER

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...

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Bibliographic Details
Main Authors HASEGAWA, Takemi, SUGANUMA, Takahiro, SAKUMA, Hirotaka, HAYASHI, Tetsuya
Format Patent
LanguageEnglish
French
German
Published 20.03.2024
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary: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.
Bibliography:Application Number: EP20210889192