Optical amplifier
CA 2060287 C · Owner: Alcatel N.V. · Inventors: Pfeiffer, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pump light which, in optical amplifiers for amplifying light signals that arc transmitted in optical waveguides (4, 8), is fed through a fiber-optic coupler (5) into a light-signal-amplifying length of fiber (3) and is not completely absorbed therein can, cause problems in the transmission section. According to the invention the light-signal-, amplifying length of fiber (3) is followed by an ytterbium-containing pump-light-absorbing length of giber (7), which has a large absorption cross-section in the wavelength range of 900-1050 ~~ in which the, wavelength of the pump light coming from a laser is located. -10-
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 29, 1992 and granted July 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2014.
- 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.