Optical amplifier stage
CA 2330202 A1 · Owner: Cordina, Kevin · Inventors: King, Jonathan P.; Cordina, Kevin; Kean, Peter N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An intermediate optical amplifier stage of an optical amplifier having cascaded amplifier stages includes an optical circulator having a first port forwardly coupled with a second port which is forwardly coupled with a third port, wherein the second port is optically coupled with an orthogonal polarisation state converting reflector via a length of optically pumped optically amplifying optical fibre. The orthogonal polarisation state converting, reflector may be constituted by the series combination of a collimating lens a, Faraday rotator that provides a .pi./4 plane of polarisation rotation in respect of, a single transit of light through the rotator and a mirror. An alternative , form, …
Read the whole patent
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 January 3, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 3, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 3, 2023.
- 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
Timeline From CIPO dates
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.