Method and apparatus for measuring and estimating optical signal to noise ratio in photonic networks
CA 2375706 A1 · Owner: Heath, Richard W. · Inventors: Anslow, Peter J.; Heath, Richard W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A WDM optical network comprising a plurality of nodes has a first apparatus for optical, analysis at the site of a first optical amplifier upstream of the first node a second apparatus for, optical analysis at the site of a second optical amplifier at the downstream output of the first, soda, and a third apparatus for optical analysis at the sift of a third optical amplifier further, downstream of the first node where knowledge of the optical signal to noise ratio (OSNR) is, desired. The first, second and third apparatus are for measuring the signal level at frequencies, both at and in-between the channel frequencies. The signal levels at the channel frequencies, and between the …
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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 March 11, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 11, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 2024.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.