Cable containing fiber ribbons with optimized frictional properties
AssigneeSiecor Corporation
InventorsGregory A. Lochkovic, John R. Keesee, Christopher K. Eoll, Gregory A. Mills
Life of this patent
Estimating the term…
Abstract
In a ribbon type fiber optic cable there is disposed a stack of fiber optic ribbons, each composed of a set of individually coated optical fibers in a planar relationship to one another with the set of coated optical fibers also coated by a common coating of ultraviolet light cured material. The coefficient of friction between adjacent ribbons in a stack is equal to or less than 0.70.
Claims22
An optical ribbon cable, comprising:
- a cable holding a stack of at least two optical ribbons in contacting relation, each optical ribbon comprising a plurality of optical fibers with an external common coating of ultraviolet light cured material, said common coating materials having a coating material to coating material coefficient of friction not greater than about 0.70.
An optical ribbon cable, comprising:
- a cable holding a stack of at least two optical ribbons in contacting relation, each optical ribbon comprising a plurality of optical fibers with an external common coating of material having a secant modulus of elasticity in the range of 150 MPa to 300 MPa inclusive measured at 2.5% strain, said common coating materials having a coating material to coating material coefficient of friction not greater than about 0.70.
An optical ribbon cable, comprising:
- a cable holding stack of at least two optical ribbons in contacting relation, each optical ribbon comprising a plurality of optical fibers with an external common coating of material having a secant modulus of elasticity greater than 150 MPa and less that 1500 MPa inclusive measured at 2.5% strain, said common coating materials having a coating material to coating material coefficient of friction not greater than about 0.70.
A fiber optic ribbon cable, comprising a stack of optical fiber ribbons, with the outer surface of each optical fiber ribbon contacting the outer surface of at least one other optical fiber ribbon, each ribbon comprising a plurality of individually coated optical fibers in a planar relationship one to another and coated by a single layer of a common coating formed of an ultraviolet light-cured material which forms the outer surface of such ribbon, the static coefficient of friction between contacting common coating layers being less than or equal to 0.70.
A method of determining the static coefficient of friction between contacting plastic ribbons each containing optical fibers, comprising securing a first such ribbon to a mandrel, securing a mass M.sub.w to a first end of a second such ribbon and immobilizing a second end of the second such ribbon, sliding the second such ribbon over the first such ribbon to determine a peak tension F.sub.D, and calculating the static coefficient of friction .mu. from the formula .mu.=(1/.pi.) 1n {[(F.sub.D /(M.sub.w g)]-1]}.
Dependencies are inferred from the claim text.