Tunable grating-based dispersion compensator
CA 2424032 A1 · Owner: Bailey, Timothy J. · Inventors: Putnam, Martin A.; Bailey, Timothy J.; Kersey, Alan D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tunable dispersion compensating device includes a grating element (102) in the form of a bulk or large diameter waveguide having an outer cladding (104) , disposed about an inner core (106). The grating element may be etched grounded or machined to form a generally "dog bone" shape wherein the end , portions (108) of the grating element has a larger diameter than the center portion (110) disposed therebetween. A chirped grating (112) is written or impressed within the portion of the core disposed in the center portion of the grating element. The center portion is tapered to allow different stresses to be applied along the grating length when the grating element is compressed …
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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 September 27, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 27, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 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.