Improved power tap
CA 2282610 A1 · Owner: Jds Fitel Photonics C.V. · Inventors: Bulthuis, Hindrik Freerk
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention pertains to an optical waveguide structure comprising at least one optical main waveguide and at least one power tap for tapping of signal power carried in the guided mode of the optical main waveguide wherein for, tapping the optical main waveguide gradually widens over a length LtaPer to a width WtaPer and then gradually narrows to a finite width thereby forming a, tapered waveguide, and the power tap branches from the tapered waveguide. The tapered form of the waveguide allows only a fraction of the guided mode to be coupled into the power tap; hence the loss resulting from the power tap is kept to a minimum. Further, tapping is virtually wavelength-independent and the, …
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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 September 16, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 16, 2021.
- 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
Timeline From CIPO dates
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.