Method of fabrication of optical fibres with non- circular core crosssection
CA 1289746 C · Owner: Cselt - Centro Studi E Laboratori Telecommunicazioni S.P.A. · Inventors: Grego, Giorgio; Cocito, Giuseppe; Modone, Eros
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is provided for fabrication of optical fibres with non-circular core cross section using the ICVD technique, by depositing layers of material which vary in thickness around the internal perimeter of each section of a reaction tube so as to form a preform which can be collapsed to a non-circular profile. The non-uniform thickness can be obtained by varying the profile or wall thickness of the reaction tube, or by selectively shielding the tube from a heat source, so as to vary the temperature at different points on the periphery of the tube during deposition.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted October 1, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 1, 2008.
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Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.