Intermediate-state-assisted optical coupler
CA 2328948 A1 · Owner: Orenstein, Meir · Inventors: Orenstein, Meir; Vorobeichik, Ilya; Moiseyev, Nimrod
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical coupler, for coupling two optical waveguides (50 60), and an , optical switch based on the optical coupler. The indices of refraction of parallel sections of the two waveguides (50 60) are reversibly perturbed , periodically in space by imposing a mechanism (58 68, 59, 69) to couple low , order modes in the two waveguides via a high order mode common to the two waveguides. The waveguides are thus coupled with a beat length that may be five or more orders of magnitude shorter than it would be without the periodic perturbations.
Read the whole patent
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 April 19, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 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.