Polarisation mode dispersion compensator
CA 2468932 A1 · Owner: Ericsson Ab · Inventors: Colavolpe, Giulio; Forestieri, Enrico
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for the adaptive adjustment of a PMD compensator in optical fiber communication systems with the compensator comprising a cascade of adjustable optical devices through which passes an optical signal to be compensated and comprising the steps of computing the Stokes parameters S~0 S~1, S~2, S~3 in , a number Q of different frequencies of the signal output from the compensator producing control signals for parameters of at least some of said adjustable optical devices so as to make virtually constant said Stokes parameters computed at different frequencies. A compensator comprising a cascade of adjustable optical devices (12-14) through which passes an optical signal to be …
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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 29, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 29, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2024.
- 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.