Optical waveguides – Optical fiber waveguide with cladding
Reexamination Certificate
2007-05-08
2007-05-08
Connelly-Cushwa, Michelle (Department: 2874)
Optical waveguides
Optical fiber waveguide with cladding
C065S377000, C065S381000, C065S382000, C065S385000
Reexamination Certificate
active
10522530
ABSTRACT:
A process and apparatus for elongating an optical fibre preform includes heating the preform so as to soften one region thereof; elongating the preform by submitting the preform to a traction; determining, during the step of elongating, the preform diameter in at least one measuring point along the preform; and controlling the step of elongating on the basis of the determined diameter. During the step of elongating, at least a geometrical parameter of the preform is measured, and the position of said diameter measuring point is controlled according to the measured geometrical parameter. Measuring at least a geometrical parameter of the preform may be accomplished by determining the profile of at least a portion of the softened region, e.g., an image of the neck region profile.
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Mileo Antonio
Ruzzier Marco
Chu Chris
Connelly-Cushwa Michelle
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Prysmian Cavi E Sistemi Energia S.R.L.
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