Polarization-insensitive optical four-photon mixer with orthogonally-polarized pump signals
CA 2122175 C · Owner: Jopson, Robert Meachem · Inventors: Jopson, Robert Meachem
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides an apparatus and method for performing polarization-insensitive four-photon mixing of optical signals. The polarizationinsensitive optical mixer receives an input optical signal and two substantially orthogonally polarized pump signals. The input optical signal and the two substantially orthogonally polarized pump signals are combined in a beam combiner and then four-photon mixed in a first nonlinear mixing device to produce a number of mixing products. The two substantially orthogonally polarized pump signals may he generated in an orthogonal pump signal generator which includes a second nonlinear mixing device for four-photon mixing the first pump signal 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 April 26, 1994 and granted May 18, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 26, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 2016.
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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.