Method for transmitting optical polarization multiplex signals
CA 2499091 C · Owner: Xieon Networks S.A.R.L. · Inventors: Gottwald, Erich; Calabro, Stefano; Spinnler, Bernhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Binary signals (A, B, C, D) are converted at the transmission end into two optical signals (QPS1, QPS2) which are combined into a polarization multiplex signal (PMS) and are then transmitted. The transmitted polarization multiplex signal (PMS) is divided at the receiving end into two polarized signal parts (PS1, PS2) which are converted in a linear manner into orthogonal electrical components (I1, Q1; I2, Q2) and are supplied to a multidimensional filter (16). Said multidimensional filter (16) replaces a polarization controller restores the signal values (I11 + jQ11; I12 + jQ12) that correspond to the signals (QPS1, QPS2) at the transmission end and compensates signal , distortions.
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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 August 13, 2003 and granted November 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 13, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 13, 2025.
- 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.