Minimum phase dispersion compensator
CA 2223672 C · Owner: Telecommunications Research Laboratories · Inventors: Davies, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for implementing post-detection dispersion compensation on a minimum-phase optical single sideband signal propagating along an optical fiber in, which the optical fiber induces phase distortion on the minimum-phase optical single sideband signal. The apparatus comprises a first envelope detector adapted to be coupled with the optical fiber and having as output an envelope signal representing the envelope of the minimum-phase optical single sideband signal, a phase synthesizer connected to the output of the first envelope detector for generating a phase signal representing the phase of the minimum-phase optical single sideband signal a combiner, having as input the envelope …
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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 4, 1997 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 4, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2019.
- 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.