Photonic switch architecture utilizing code and wavelength multiplexing
CA 1313430 C · Owner: American Telephone And Telegraph Company · Inventors: Rzeszewski, Theodore Stanley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, An optical multiplexer and demultiplexer using combined code division and wavelength division multiplexing. The multiplexer comprises a plurality of code division multiplexers, each responsive to a plurality of input signals and a plurality of orthogonal code sequences and a wave division multiplexer for, generating an output signal representing the signals of each code division multiplexer carried on a different wavelength. Each code division multiplexer comprises a plurality of lithium niobate phase shifters each comprising an indiffused, titanium wave guide and a pair of electrodes for the accepting one of the orthogonal code sequences, to modulate the lightwave being passed …
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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 February 2, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 2, 2010.
- 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.