Integrated multi-wavelength transmitter
CA 2278482 C · Owner: Soole, Julian B. D. · Inventors: Zah, Chung-En; Amersfoort, Martin R.; Soole, Julian B. D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An integrated multi-wavelength transmitter comprising an arrayed waveguide grating with feedback channels (32) between two coupling regions (34 36). The , multi-wavelength signal from a first coupling region (34) is reflected from a mirrored surface (54) back into the first coupling region and the arrayed waveguide grating, the mirrored surface thus forming one end of an optical cavity. Each single-wavelength output from second coupler (36) is split up into one part until it passes through a gain region (52) and is reflected back from the mirrored surface (54) whereas a second part passes modulator (58) and enters the first coupler. The multi-wavelength signal (42) from the second …
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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 January 15, 1998 and granted June 4, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 15, 2020.
- 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.