Telecommunication cable equipped with microstructured optical fibres
AssigneePrysmian S.p.A.
InventorsEnrico Consonni, Franco Cocchini, Antonio Collaro, Antonio Adigrat
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Abstract
Telecommunication cable comprising at least one microstructured optical fiber comprising a core region and a cladding region surrounding the core region, the cladding region comprising an annular void-containing region comprised of randomly arranged voids, the core region including doped silica to provide a positive refractive index relative to pure silica; and at least one protecting layer provided around said optical fiber, the protecting layer being made of a polymeric material having a low ultimate elongation.
Claims13
A telecommunication cable comprising:
- at least one microstructured optical fibre comprising a core region and a cladding region surrounding the core region, the cladding region comprising an annular void-containing region comprised of randomly arranged voids, the core region comprising doped silica to provide a positive refractive index relative to pure silica;
- at least one coating layer surrounding said optical fiber;
- and
- at least one protecting layer provided around and substantially in contact with said at least one coating layer, the at least one protecting layer being a tight buffer layer made of a polymeric material having a composition resulting in an ultimate elongation of 50% to 200% and an average stripping force of from 0.10 N/15 mm to 0.50 N/15 mm.
A buffered microstructured optical fibre comprising a core region having a positive refractive index relative to pure silica and a cladding region surrounding the core region, comprising an annular void-containing region comprised of randomly arranged voids;
- a coating system;
- and a tight buffer layer having a composition resulting in an ultimate elongation of 50% to 200% and an average stripping force of from 0.10 N/15 mm to 0.50 N/15 mm surrounding the coating system in direct contact therewith, said optical fibre having a core-to-clad diameter ratio greater than 0.30.
Dependencies are inferred from the claim text.