Optical demultiplexing
CA 1295059 C · Owner: British Telecommunications Public Limited Company · Inventors: Hill, Alan M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Optical Multiplexing, An optical signal is multiplexed for use in a network including a control station (1) a high data rate, optical path (2) connecting the control station (1) to a node (3,4) and low data rate optical paths (8 20), extending from the node (3, 4) to receiving stations (5). The method of multiplexing includes repeatedly sweeping the source (6) of the optical signal through a wide wavelength range such that a distinct wavelength channel is provided for each receiving station (5). The repetition rate is equal to the low data rate. At the node (3, 4) the signal is resolved into constituent wavelength channels occupying distinct time slots and transmitted via respective low …
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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
- Granted January 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 28, 2009.
- 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.