Narrow-band optical modulator with reduced power requirement
CA 2301155 A1 · Owner: Pirelli Cavi E Sistemi S.P.A. · Inventors: Gobetti, Gianluca; Casaccia, Emilio; Bosso, Sergio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical modulator includes an optical waveguide (88) and an electrode structure coupled to the waveguide such that a modulating signal applied to the electrode structure (90, 92, 94) varies the refractive index of the waveguide so as to produce a modulated optical output signal. The electrode is fabricated in the form of a transmission line terminated in a short circuit (94). The ratio of the wavelength of the modulating signal to the effective length of the electrode is comprised between 2.1 and 4.0 and is preferably of , approximately 2.7. The modulator can be constructed to provide either phase or amplitude modulation. An optical transmission method having SBS suppression and …
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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 August 4, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 4, 2020.
- 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
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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.