US Patent 7418178 Multi-core fiber

Patent 7418178 was granted and assigned to Fujikura on August, 2008 by the United States Patent and Trademark Office.

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Patent Inventor Names

Kazuhiko Aikawa0

Manabu Kudou0

Takashi Tsumanuma0

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Patent abstract

A multi-core optical fiber apparatus is disclosed. The multi-core optical fiber apparatus includes a cladding comprising quartz and a plurality of cores embedded in the cladding. Each of the cores has a diameter (D) ranging from 1.3 μm to 2.0 μm, a numerical aperture (NA) from 0.35 to 0.45 and a refractive index profile factor (α) from 2.0 to 4.0. A center of each of the cores has a germanium content of 20 wt % to 30 wt %. An interval between adjacent cores is 3.0 μm or more.

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https://pdfpiw.uspto.gov/.piw?Docid=07418178

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