Optical waveguide wavelength filter with ring resonator and 1xn optical waveguide wavelength filter
CA 2362398 A1 · Owner: Kaneko, Taro · Inventors: Kokubun, Yasuo; Sato, Shinya; Kaneko, Taro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel optical waveguide wavelength filter with a ring resonator (3) in which an ADD/DROP operation between an input-side optical waveguide (1) and an output-side optical waveguide (2) through the ring resonator (3) is performed wherein the input-side optical waveguide (1) intersects the output-side optical waveguide (2), and the ring resonator (3) is superposed on the input- and output-side optical waveguides (1, 2) whereby a 1xN optical waveguide , wavelength filter is easily realized. A 1xN optical waveguide wavelength filter composed of such an optical waveguide wavelength filter having a small , size, and having an excellent filter response is also disclosed.
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 February 9, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 9, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 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
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.