Optical switching element between two light wave guides and optical switching matrix constituted by these switching elements
CA 1263261 C · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Erman, Marko; Theeten, Jean-Bernard; Vodjdani, Nakita
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
21, ABSTRACT:, "Optical switching element between two light wave guides and optical switching matrix formed by these switching elements". An optical switching element including two parallel light wave guides, whose opposite walls are mutually separated by a small distance (d) the so-called, coupling distance, each constituted by a strip of a semiconductor material formed on a semiconductor substrate having a refractive index lower than that of the guides these guides each transporting a monomode wave and the switching being initiated by the effect of polarization means applied to the guides, characterized in that the strip constituting one of the guides (G1) designated as first guide 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
- Granted November 28, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 28, 2006.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.