Optoelectronic device with wavelength filtering by cavity coupling
CA 2437433 C · Owner: Leclercq, Jean-Louis · Inventors: Leclercq, Jean-Louis; Viktorovitch, Pierre; Garrigues, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns an optoelectronic device comprising first means (12 13) defining a first thick resonant cavity (11) having a multiple transmission resonant modes second means (18, 19, 37) defining a second thin resonant cavity (17) having one transmission resonant mode means (38, 39) for optically coupling the first and second means and electrostatic means designed to apply to the second means (18 19, 37) an electric voltage selected to vary the thickness of the second cavity (17) and the spectral position of its resonant mode such that it coincides with one of the resonant modes of the first cavity (11).
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 1, 2002 and granted December 18, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 1, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 2024.
- 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.