An optical fibre bragg grating device with passive compensation of temperature
CA 2291700 A1 · Owner: Rossotto, Oriana · Inventors: Tallone, Luigi; Boschis, Laura; Rossotto, Oriana
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical fibre Bragg grating device with passive compensation of temperature comprises a grating manufactured on a conventional optical fibre for telecommunications and having a period such that the mode guided by the core of the fibre is coupled to the higher order modes of the cladding, and a support on which the fibre length is fixed. The compensation is obtained by making the support in a material whose coefficient of thermal expansion is such as to compensate for the shift of the spectral peak of the grating due to temperature variations.
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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 December 3, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 3, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 2021.
- 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.