Device for and method of modifying the spectral characteristics of optical signals
CA 2186819 C · Owner: Otc - Optical Technologies Center S.R.L. · Inventors: Ciaramella, Ernesto; Artiglia, Massimo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The modification is accomplished on the basis of the solution known as spectral inversion (or optical phase conjugation). The device (1) comprises a medium such as, typically a dispersion shifted optical fibre (4) into, which the signal to be modified is injected together with a pump signal at such a level as to induce modulation instability in the fibre (4). At the output of fibre (4) a spectrally inverted optical signal is available which, signal is translated in wavelength and is obtained with high conversion efficiency. Preferably in order to avoid, stimulated Brillouin scattering the pump signal is, subjected to spectrum broadening for instance by means of, a modulator (5). (Figure 1)
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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 30, 1996 and granted September 28, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2018.
- 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.