Transmissive active fiber-optic star coupler for a network system
CA 2073808 A1 · Owner: Chen, Yung-Kuang · Inventors: Chen, Yung-Kuang; Liaw, Jy-Wang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Transmissive Active Fiber-Optic Star Coupler for a Network system, A fiber-optic star coupler is configured by associating fiber amplifiers and passive fiber-optic star couplers to form a transmissive N*N active fiber-optic star coupler. The star coupler mainly contains 4*4 active fiber-optic star couplers and 2*2 3dB passive fiberoptic couplers acting as basic optical elements wherein, each of the 4*4 active fiber-optic star coupler is composed of six units of 2*2 3dB(or two units of 4*1 optical coupler), a dichroic coupler, an optical amplified fiber, and an optical isolator. By using a plurality of 4*4 active fiber-optic star couplers and 2*2 3dB passive fiber-optic coupler, it is …
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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 July 14, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 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.