Optical transmission system having cascaded raman amplifiers which each have a number of pump sources
CA 2363365 C · Owner: Krummrich, Peter · Inventors: Krummrich, Peter; Neuhauser, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical transmission system comprises a plurality of cascaded Raman amplifiers which each include a number of pump sources, wherein in order to achieve a flat gain spectrum for a signal which has a number of optical channels, the plurality of pump sources has at least two different wavelength sets respectively associated with at least two different Raman amplifiers.
Read the whole patent
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 21, 2001 and granted March 22, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 21, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2023.
- 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.