Optical sampling by modulating a pulse train
CA 2222666 C · Owner: Northern Telecom Limited · Inventors: Hadjifotiou, Anagnostis; Roberts, Kim Byron
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An interferometer, such as a Mach-Zehnder type is fed with a pulse train. One arm is fed with a data stream so as to modulate the, pulse train according to the data stream. This enables the data stream to be regenerated, or sampled without converting from optical form into electrical form. Thus all optical regeneration multiplexing, demultiplexing or retiming to remove jitter can be achieved. An, optical amplifier (20) in one arm of the interferometer enables the interference condition of the interferometer to be varied to cause the, pulse train to be modulated by the data.
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 26, 1997 and granted January 15, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 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.