Dispersion shifted large effective area waveguide fiber
CA 2392328 A1 · Owner: Liu, Yanming · Inventors: Liu, Yanming
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a dispersion shifted optical waveguide fiber having low but nonzero dispersion over an extended wavelength window that includes wavelengths from 1470 nm to 1625 nm. Waveguide fiber core refractive index profiles exhibit the desired dispersion performance while maintaining resistance to pin array and lateral load bending at least equivalent to standard waveguide fiber. Attenuation over the operating wavelength range is low and zero dispersion wavelength is typically less than 1450 nm.
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 October 23, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 23, 2022.
- 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.