Optical multiplexor/demultiplexor
CA 2281044 A1 · Owner: Cheng, Yihao · Inventors: Cheng, Yihao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multiplexor/demultiplexor employs a bulk grating an array of input/output, waveguides, and a lens between the grating and the array of waveguides. A concentrator, chip is disposed between the array of waveguides and the lens for providing closely, spaced waveguides for transmitting/receiving light to/from the lens in a multiplexing/demultiplexing mode of operation respectively. At another end of the, concentrator chip waveguides are less closely spaced to couple with the array of, input/output waveguides. Since the core separation of the of the cores of the receiving, waveguides (in a demultiplexing mode) is inversely proportional to the bandwidth of the, demultiplexed channels …
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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 August 27, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 27, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 27, 2021.
- 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.