Optical channel monitor
CA 2448898 C · Owner: Moon, John · Inventors: Winston, Charles; Sirkis, James; Pinto, Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical channel monitor is provided that sequentially or selectively filters an optical channel(s) (11) of light from a (WDM) optical input signal (12) and senses predetermined parameters of the each filtered optical signal (e.g. channel power, channel presence, signal-noise-ratio). The OCM (200) is a free-space optical device that includes a collimator assembly (224) a , diffraction grating (214) and a mirror (202). A launch pigtail (220) emits into free space the input signal through the collimator assembly (224) and onto the diffraction grating (214), which separates spatially each of the optical channels (11) of the collimated light and reflects the sep arated , channels of …
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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 May 31, 2002 and granted March 1, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 31, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 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
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.