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US 10,884,208 B2Granted
Optical fiber cable
AssigneeFujikura Ltd.
InventorsTomoaki Kaji, Kouji Tomikawa, Ken Osato
Life of this patent
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Abstract
An optical fiber cable includes: a core; a sheath that accommodates the core therein; and a pair of tension members embedded in the sheath. The core includes: a plurality of optical fiber units that each includes a plurality of optical fibers; fibrous fillings that extend in a longitudinal direction in which the plurality of optical fiber units extends; and a wrapping tube that encloses the plurality of optical fiber units and the fibrous fillings. The core is interposed between the pair of tension members.
Claims8
An optical fiber cable comprising:
- a core comprising:
- a plurality of optical fiber units each comprising a plurality of optical fibers;
- fibrous fillings that extend in a longitudinal direction in which the plurality of optical fiber units extends;
- and
- a wrapping tube that encloses the plurality of optical fiber units and the fibrous fillings;
- a sheath that accommodates the core therein;
- and
- a pair of tension members embedded in the sheath, wherein
- the core is interposed between the pair of tension members, and
- the following equations are held:
- 0.16≤Sb/Sf≤0.25 and 0.10≤Sb/(Sc−Sw)≤0.15,
- where in a transverse cross-sectional view of the optical fiber cable:
- Sf is a total value of cross-sectional areas of the plurality of optical fibers, Sb is a total value of cross-sectional areas of the fibrous fillings, Sc is a cross-sectional area of an inner space of the sheath, and Sw is a cross-sectional area of the wrapping tube.
10 more elements
Dependencies are inferred from the claim text.