Method for optical communication of information
CA 1282832 C · Owner: Krone Aktiengesellschaft · Inventors: Rocks, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Summary, The invention describes a method for optical communication of information between transmitter and receiver spatially separated from each other. The principle of heterodyne reception is utilized. A non-modulated optical carrier of a laser arranged on the receiving side is subdivided in a first fibre-optical coupler (KE) into two portions, the transmission path (EMF) and the local laser wave (LL). In one branch, a dispacement of frequency by the amount .DELTA.f takes place. The non-modulated optical carrier passes through a one-mode fibre (EMF) in direction transmitting side and is modulated there with an effective signal in a modulator (MOD) (Fig. 1). This now modulated optical …
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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 April 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 9, 2008.
- 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.