Directional coupler and mach-zehnder modulator using such coupler
CA 2300568 A1 · Owner: Pirelli Cavi E Sistemi S.P.A. · Inventors: Castoldi, Andrea
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dual output electro-optical modulator (100) for modulating an optical signal by an electrical signal (285), comprising a Mach-Zehnder interferometer with an input, path (102), two arms (103, 104) and a directional coupler (105) wherein the, directional coupler comprise two waveguides on a planar substrate (101) defining, two inputs, two outputs anal a coupling region between the inputs and the outputs, where the waveguides are in close proximity to each other so as to cause coupling, between them. The coupling region of the directional coupler comprises a strong, coupling region and in that the length of parallel sections of optical waveguides in the, coupling region is less than …
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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 March 13, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 13, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 2022.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.