Optical communication systems using fabry-perot cavities
CA 2006125 C · Owner: Iannone, Patrick P. · Inventors: Li, Tingye; Iannone, Patrick P.; Stulz, Lawrence Warren
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
One aspect of the invention is a Fabry-Perot cavity which comprises in part a waveguiding portion and in part a nonwaveguiding portion. In this manner a, cavity is constructed whose length would be too short to manipulate effectively if it were comprised exclusively of a waveguiding portion and whose length might haveunacceptable diffraction losses if it were comprised exclusively of a nonwaveguiding portion. In the inventive device the resonant wavelength can be adjusted by varying the length of either the gap or the waveguide or both. The device can be advantageously constructed and aligned using fiber coupling technology. In another aspect of the invention a light source comprising a …
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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 20, 1989 and granted October 18, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2011.
- 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.