Input coupling for reducing the wavelength dependency of an integrated optical filter
CA 2344582 A1 · Owner: Jds Uniphase Inc. · Inventors: Delisle, Vincent; Hnatiw, Alan J.P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an optical filter comprising an integrated wavelength, dispersive element having an input for providing temperature compensation particularly, for providing passive temperature compensation in an arrayed waveguide grating. The, present invention has found that by providing an arrayed waveguide grating having a, thermally responsive pivotal input structure for changing an angle of a collimated input, signal launched into a focusing lens the input point can be selected in , response to changing temperature in order to compensate for thermal drift of the center wavelength. Further, the present invention has found that by providing a reflective lens …
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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 April 19, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 19, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 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.