Optical amplifier
CA 2068870 C · Owner: Shirasaki, Masataka · Inventors: Shirasaki, Masataka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical amplifier is disclosed which in an, optical amplifier adapted such that signal light and pump light are propagated through an optical waveguide structure (2, 2') therein made of an optically nonlinear material to thereby achieve optical parametric amplification or four-wave mixing optical amplification of the signal light, is provided with means for attenuating idler light to be generated within the optical waveguide structure. The optical amplifier has an advantage that phase matching between the pump light and the signal light is easily achieved and thus an optical amplifier operative over a broad frequency band can be realized.
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 September 17, 1991 and granted January 28, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 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.