Method and device for dropping optical channels in an optical transmission system
CA 2334542 A1 · Owner: Aina, Stefano · Inventors: Aina, Stefano; Meli, Fausto; Barozzi, Gianpaolo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention proposes a method and a device to add and drop optical channels in an optical transmission system (1) in which a multi-channel optical signal is transmitted into an optical fiber line (300). The OADM (Optical Add/Drop Multiplexer) device (695; 695') includes an optical splitter (673) receiving an input signal which includes at least one sub-group of the whole channels. Optical splitter (673) has an unbalanced power splitting ratio - in the range 60:40 to 90:10 - for feeding a main power fraction (60 % to 90 %) of said input signal to a first output port and a secondary power fraction (40 % to 10 %) of said input signal to a second output port. The secondary …
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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 June 7, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 7, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2021.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.