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US 12,001,070 B2Granted
Flexible optical-fiber ribbon
AssigneePrysmian S.p.A.
InventorsEhsan Fallahmohammadi, Clint Nicholaus Anderson, Brian G. Risch, Andrea Terry, John R. Sach, Jeffrey Scott Barker, Ryan Truong
Life of this patent
Estimating the term…
Abstract
An optical-fiber ribbon having excellent flexibility, strength, and robustness facilitates separation of an optical fiber from the optical-fiber ribbon without damaging the optical fiber's glass core, glass cladding, primary coating, secondary coating, and ink layer, if present.
Claims20
An optical-fiber ribbon, comprising:
- (i) a plurality of respectively adjacent optical fibers extending in a longitudinal direction and arranged in parallel to form an optical-fiber assembly, wherein each optical fiber includes, from its center to its periphery, a glass core, a glass cladding, a primary coating, and an outermost secondary coating comprising a cured first curable resin;
- and
- (ii) a plurality of successive elongated rectilinear beads comprising a cured second curable resin arranged along the optical-fiber assembly, wherein the beads are configured to form elongated bonds between adjacent optical fibers in the optical-fiber assembly;
- wherein, as measured by a T-peel test, the force required to separate one optical fiber from the optical-fiber ribbon is between 0.01 N and 0.2 N;
- and
- wherein, along at least a portion of the optical-fiber ribbon that includes one or more elongated rectilinear beads, each bead is configured so that when removing an optical fiber during optical-fiber breakout the corresponding point of failure occurs (i) within the bead without damaging the optical fiber's primary coating and/or the optical fiber's outermost secondary coating, and/or (ii) at the interface between the bead and the outermost secondary coating without damaging the optical fiber's primary coating and/or the optical fiber's outermost secondary coating.
3 more elements
An optical-fiber ribbon, comprising:
- (i) a plurality of respectively adjacent optical fibers extending in a longitudinal direction and arranged in parallel to form an optical-fiber assembly, wherein each optical fiber includes, from its center to its periphery, a glass core, a glass cladding, a primary coating, a secondary coating, and an outermost ink layer comprising a cured first curable resin;
- and
- (ii) a plurality of successive elongated rectilinear beads comprising a cured second curable resin arranged along the optical-fiber assembly, wherein the beads are configured to form elongated bonds between adjacent optical fibers in the optical-fiber assembly;
- wherein, as measured by a T-peel test, the force required to separate one optical fiber from the optical-fiber ribbon is between 0.01 N and 0.2 N;
- and
- wherein, along at least a portion of the optical-fiber ribbon that includes one or more elongated rectilinear beads, each bead is configured so that when removing an optical fiber during optical-fiber breakout the corresponding point of failure occurs (i) within the bead without damaging the optical fiber's primary coating, the optical fiber's secondary coating, and/or the optical fiber's outermost ink layer, and/or (ii) at the interface between the bead and the outermost ink layer without damaging the optical fiber's primary coating, the optical fiber's secondary coating, and/or the optical fiber's outermost ink layer.
3 more elements
Dependencies are inferred from the claim text.