Large diameter optical waveguide, grating, and laser
CA 2394910 C · Owner: Putnam, Martin A. · Inventors: Kersey, Alan D.; Sullivan, James M.; Bailey, Timothy J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A large diameter optical waveguide, grating and laser includes a waveguide , (10) having at least one core surrounded by a cladding the core propagating , light in substantially a few transverse spatial modes; and having an outer waveguide dimension of said waveguide being greater than about 0.3mm. The waveguide may be axially compressed which causes the length of the waveguide to decrease without buckling. The waveguide may be used for any application where a waveguide needs to be compression tuned e.g. compression-tuned fiber , Bragg gratings and lasers or other applications. Also the waveguide exhibits , lower mode coupling from the core to the cladding and allows for higher optical …
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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 December 5, 2000 and granted January 31, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2022.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.