Method and apparatus for measuring polarization mode dispersion of optical devices
CA 2229219 A1 · Owner: Exfo Electro-Optical Engineering Inc. · Inventors: Cyr, Normand
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for measuring very low levels of polarization mode dispersion of optical devices, that is inexpensive, robust and portable comprises a , broadband source, and a polarizer for directing substantially completely polarized broadband light into the, device under test with the polarization in a plane substantially perpendicular to the, propagation direction of the light. Light leaving the device is analyzed spectrally to, produce a spectrum of intensity in dependence upon wavelength or frequency of such, light four each of at least two mutually orthogonal polarization axes in a plane, perpendicular to the propagation axis of the light leaving the device. The spectra are used, to …
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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 February 23, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 2020.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.