Apparatus and method for fabricating chiral fiber gratings
CA 2443980 A1 · Owner: Singer, Jonathan · Inventors: Chao, Norman; Singer, Jonathan; Kopp, Victor Il'Ich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus(100) and method for fabricating fiber gratings from optical fibers(114) by imposing constant or variable chiral refractive index modulation along an optical fiber. The refractive index modulation may be of single helix symmetry or of double helix symmetry. In several embodiments of the present invention the refractive index modulation is imposed by twisting and moving a specially prepared optical fiber through a heater(116) that heats a small region of the fiber to a temperature sufficient to allow the fiber to twist in that region as it moves through the heater. Alternately a normal , optical fiber may specially prepared for use with the apparatus of the present …
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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
- Filed March 14, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 14, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2024.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.