Method of and device for measuring the nonlinear refractive index in a single mode optical fibre
CA 2177906 C · Owner: Calvani, Riccardo · Inventors: Roccato, Diego; Calvani, Riccardo; Naddeo, Claudio
Overview
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A method and apparatus for determining the nonlinear refractive index coefficient for an optical fibre. The method comprising sending a train of transform-limited optical pulses with wavelength close to the zero-dispersion wavelength of the fibre and high and variable peak power so as to give rise to self-phase modulation into a fibre;, measuring the spectral broadening of the signal exiting the fibre for a number of values of the peak power of the pulses; and obtaining the nonlinear refractive index from the angular coefficient of the straight line representing spectral broadening versus peak power. The apparatus for performing the method includes means for determining the spectral …
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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 May 31, 1996 and granted July 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 31, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 2018.
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