Optical waveguide amplifier source gyroscope
CA 2048337 C · Owner: Kim, Byoung Yoon · Inventors: Fesler, Kenneth A.; Kim, Byoung Yoon; Shaw, Herbert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved Sagnac interferometer includes a broadband light source (100) that comprises a fluorescent optical medium which is pumped by light from a pump source with a sufficient intensity to cause the fluorescent optical medium to generate temporally incoherent light by superfluorescence. In the preferred embodiment the, superfluorescent optical medium comprises an optical fiber (130) which is backward pumped. The light signal input into the sensing loop (142) of the interferometer is amplified by a modulator, output from the interferometer loop (142) and amplified by the optical gain of the superfluorescent fiber which acts as a light source (100) and as an amplifier. In order to avoid …
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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 July 31, 1991 and granted April 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 31, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2013.
- 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.