Optical fiber cable
AssigneeSumitomo Electric Industries, Ltd.
InventorsTetsuya HAYASHI, Eisuke SASAOKA
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Abstract
The present invention relates to an optical fiber cable incorporating a multi-core fiber provided with a plurality of cores and a cladding region. The optical fiber cable has a jacket covering the multi-core fiber. The multi-core fiber is arranged so that a hold wrap holds the cores in a state in which they are provided with a bend of not more than a fixed radius of curvature, in order to reduce crosstalk between the cores.
Claims7
1-8. (canceled)
An optical fiber cable incorporating a multi-core fiber comprising a plurality of cores each extending along a predetermined axis, and a cladding region integrally surrounding the plurality of cores, said optical fiber cable comprising a bend providing structure to provide the multi-core fiber with a bend of a radius of curvature R given by the following expression:
- R
- ≤
- 1
- 12
-
- β
- K
- 2
-
- Λ
-
-
- XT
- S
- L
- F
- where Λ is an intercentral distance between adjacent cores in the multi-core fiber, LF a fiber length of the multi-core fiber corresponding to a length between repeater/regenerators in laying the optical fiber cable, β a propagation constant of each core at a first wavelength, K a coupling coefficient between adjacent cores at the first wavelength, and XTS a maximum value permitted as an average of a distribution of crosstalk after propagation of light of the first wavelength through the fiber length LF.
(canceled)
12-21. (canceled)
Dependencies are inferred from the claim text.