Optical waveguides – Optical transmission cable
Reexamination Certificate
2003-09-22
2008-08-05
Font, Frank G (Department: 2883)
Optical waveguides
Optical transmission cable
C385S104000
Reexamination Certificate
active
07409126
ABSTRACT:
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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Debut Alexis
Roba Giacomo Stefano
Sarchi Davide
Travagnin Martino
El Shammaa Mary A
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Font Frank G
Prysmian Cavi e Sistemi Energia S.r.l.
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