Optical signal amplification device using negative optical feedback
CA 2556808 C · Owner: Maeda, Yoshinobu · Inventors: Maeda, Yoshinobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical signal amplification device for outputting an output signal light which, has the same wavelength as an input signal light and an intensity variation identical in, phase with an intensity variation of the input signal light. The device includes: (a) an, amplifying element having a cross gain modulation function of outputting an output light, including (i) the output signal light and (ii) a neighboring light which has a neighboring, wavelength different from the wavelength of the output signal light and an intensity, variation inverted in phase with respect to the intensity variation of the output signal light;, (b) inputting means for inputting the input signal light to the …
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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 12, 2004 and granted November 20, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 12, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 2026.
- 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
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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.