Prysmian Cavi E Sistemi Energia S.r.l.

Prysmian S.p.a.

Alexis Debut

Martino Travagnin

Davide Sarchi

Giacomo Stefano Roba

Enrico Maria Consonni

Francesco Sartori

A buffered optical fiber includes an optical waveguide, at least one exterior coating surrounding the optical waveguide and a buffer coating surrounding the at least one exterior coating, wherein the buffer coating is a tight buffer coating made of a material having a density of at least about 1.2 Kg/dm, a thermal conductivity of at least about 0.4 W/m&#xb7;K and includes a polymeric matrix and an inorganic filler.

Buffered optical fibre and method for improving the lifetime thereof

A method of evaluating the Polarization Mode Dispersion (PMD) of an optical fiber by arranging the optical fiber at substantially zero tension on a surface, propagating prescribed evaluation optical signals along the optical fiber, measuring fiber Differential Group Delay (DGD) values in response to the evaluation optical signals, repeating at least once the acts of propagating and measuring, each time preliminarily inducing a change in a mode coupling of the fiber, and determining the fiber PMD on the basis of a calculated DGD average value. Changes in the polarization mode coupling of the fiber are induced by, moving at least a section of the fiber substantially orthogonally to the surface. An improved PMD evaluation apparatus includes a fiber arrangement surface adapted to have a fiber under test arranged thereon at substantially zero tension, and, operatively associated with the fiber arrangement surface, a fiber moving device activatable for moving the at least a section of the fiber substantially orthogonally to the fiber arrangement surface.

Method and apparatus for the evaluation of polarization mode dispersion in optical fibers

An optical fiber link has a plurality of optical fiber spans joined one to the other, the plurality of optical fiber spans including at least one first unidirectionally-spun optical fiber span and at least one second unidirectionally-spun optical fiber span having mutually opposite spinning directions.

Low polarisation mode dispersion (PMD) optical fiber link, and method of making the same

An apparatus for producing a low-PMD optical fiber having a furnace for melting a lower portion of an optical preform; a traction device for pulling an optical fiber from the lower portion of an optical preform; a spinning device for imparting a substantially constant and unidirectional spin to the optical fiber as it is pulled, which causes the fiber to undergo an elastic torsion; a winding device for winding the optical fiber onto a reel; and a twisting device for imparting to the spun optical fiber a unidirectional twist in a direction opposite the elastic torsion, so as to control the residual twist in the optical fiber. A process for producing the fiber, an optical fiber and a cable are also provided.

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Milan, Italy

Alexis Debut