Opto-electronic frequency divider circuit and method of operating same
CA 2256188 C · Owner: Otc - Optical Technologies Center S.R.L. · Inventors: Roemisch, Stefania; De Marchi, Andrea; Cisternino, Francesco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The circuit includes an electro-optical mixer such, as an electro-optical Mach-Zehnder modulator with, non-linear behaviour. The modulator receives as input an optical signal at the frequency to be divided in addition, to an electric signal at a given frequency usually, corresponding to the frequency deriving from such division. The output optical signal from modulator exhibits a modulation spectrum containing the frequency difference between the frequency to be divided and at least one harmonic of the frequency of the above electric signal. After having been converted into an electric signal the, output signal of the mixer is subjected to a filtering action to extract the above frequency …
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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 December 15, 1998 and granted February 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 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
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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.