Simultaneous transmission of led and laser signals over single mode fiber
CA 1279373 C · Owner: Bell Communications Research, Inc. · Inventors: Kazovsky, Leonid G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
At the transmitting end of an optical transmission system a wide, linewidth LED (31) is intensity modulated by a first digital information signal and a narrow linewidth DFB (Distributed Feedback) laser (32) is frequency modulated by a second digital information signal and the two modulated optical signals are combined (33) for transmission over a single mode optical fiber (34). At the receiving end the intensity modulating digital, signal is recovered from the received optical signal by a photodetector (52). The frequency modulating digital signal is recovered by a coherent receiver (53) which includes a local oscillator (55) the output of which is optically combined (54) with the received …
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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 January 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 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.