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1. (WO1997007067) OPTICAL FIBER WITH LOW POLARISATION MODE DISPERSION

Pub. No.:    WO/1997/007067    International Application No.:    PCT/EP1996/003566
Publication Date: Feb 27, 1997 International Filing Date: Aug 12, 1996
IPC: C03B 37/027
C03B 37/03
Applicants: PLASMA OPTICAL FIBRE B.V.
Inventors: GEERTMAN, Robert, Eugenio, Marie
Title: OPTICAL FIBER WITH LOW POLARISATION MODE DISPERSION
Abstract:
A method of manufacturing an optical fiber, whereby a fiber (7) is drawn from a molten extremity (3) of a preform (1) and is subsequently subjected to a torque, thereby causing a portion of the fiber to be twisted about its longitudinal axis and to be endowed with a spin, whereby the torque is applied by running the fiber (7) between a pair of wheels (11a, 11b) which rotate in mutually opposite senses about two different rotational axes (13a, 13b), each wheel (11a, 11b) having a peripheral curved surface (15a, 15b), the wheels (11a, 11b) being thus arranged that the fiber (7) runs substantially tangential to their curved surfaces (15a, 15b) and is pressed therebetween, the wheels (11a, 11b) being moved back and forth relative to one another in a direction (d, d') substantially perpendicular to the fiber (7) so as to cause the fiber (7) to be rolled back and forth between their curved surfaces (15a, 15b).