Double active-fiber optical amplifier having a wide-band signal wavelength
CA 2021801 C · Owner: Pirelli Cavi S.P.A. · Inventors: Appleyard, Andrew Paul; Grasso, Giorgio; Scrivener, Paul Laurence
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an optical amplifier in particular for, optical fiber telecommunication lines (1) operating with a, transmission signal in a predetermined wavelength range which, amplifier comprises a fluorescent active optical fiber (6) doped with erbium, having two cores (11 and 12 101 and 102), one (11, 101) of which is connected to a fiber (4) in which a transmission signal to be amplified and a luminous pumping energy are multiplexed, and to an outgoing fiber adapted to transmit the amplified signal, whereas the second core (12 102) is optically, coupled to the first core and is capable of absorbing the spontaneous erbium emission which would constitute a noise source allowing …
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 July 23, 1990 and granted November 22, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2012.
- 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.