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Expired Canadian patentCanada

High performance subcarrier multiplexed optical communication system with modulation index exceeding unity

CA 1309783 C · Owner: Olshansky, Robert · Inventors: Olshansky, Robert; Lanzisera, Vincent

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Abstract, An optical communication system includes an optical transmitter for transmitting a subcarrier multiplexed optical signal through a single mode optical fiber to an optical receiver. The optical transmitter includes an optical source for generating a light beam. The optical source is preferably a high speed laser diode emitting in a spectral range of 1.3-1.6 micrometers. The light beam is intensity modulated with a composite modulation signal comprising multiple modulated microwave carriers. Each of the microwave carriers intensity modulates the light beam with a modulation index mi to provide the optical signal for transmission. The total modulation index M defined, by M = .SIGMA. …

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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 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 7, 1989
GrantedNovember 3, 1992
Term endedNovember 3, 2009
Patent numberCA 1309783 C
Classification (IPC)H04B10/00 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedSep 7, 1989Patent grantedNov 3, 1992Term endedNov 3, 2009

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.