Spontaneous emission source having high spectral density at a desired wavelength
CA 2102644 C · Owner: General Instrument Corporation · Inventors: Huber, David R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spontaneous emission source bias a high spectral density at a desired wavelength. An integrated guided wave optical path is formed in either a semiconductor or silica substrate. An active medium and grating are provided within the optical path. The optical path is pumped to pass energy across the grating and active medium. The pump energy excites the active medium without lasing to output spontaneous emissions at a wavelength established by the grating. The source is particularly useful for reducing nonlinear effects in an optical fiber used for communicating AM or other information signals.
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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 November 8, 1993 and granted January 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 8, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2015.
- 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.