Rare earth element-doped multiple-core optical fiber and method for fabricating the same
CA 2178287 C · Owner: Imoto, Katsuyuki · Inventors: Imoto, Katsuyuki; Abe, Jun; Koya, Kazuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rare earth element-doped multiple-core optical fiber has an outer cladding layer and a plurality of cores each covered with a primary cladding layer. The cores are, positioned substantially on a central axis of the outer cladding layer and separated with a, predetermined spacing S from each other by the primary cladding layer. The outer, cladding layer is made of SiO2, or SiO2 to which a dopant like F Ge, etc. is , added. The, primary cladding layer is made of SiO2 doped with Er or SiO2 doped with Er , and F together and formed to have a predetermined thickness of 1.0µm - 1.5µm to form the, predetermined spacing S. The soot glass rods for cores and primary cladding layers are, …
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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 5, 1996 and granted July 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2018.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.