Waveguide structure having enhanced coupling with optical fibres
CA 2350863 A1 · Owner: Metrophotonics Inc. · Inventors: Koteles, Emil S.; He, Jian-Jun; Davies, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A waveguide structure having a homogeneous core material and opposing cladding layers is proposed wherein the waveguide core is substantially thick providing, polarization independence and wherein a coupling port of the waveguide core is characterized in that it has an expanded mode for better coupling to fibre. A method is, presented for producing such an expanded core.
Read the whole patent
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 June 15, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 15, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 2023.
- 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.