Optical communication system

Details Optical communication system Optical communication system

H - Electricity

04

B

H04B 10/12 (2006.01) H04B 10/02 (2006.01) H04B 10/08 (2006.01) H04B 17/02 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2273582

An optical communication system comprising: - a first transmitter; - a first receiver; - a first primary guided optical path having a protected portion; - a first secondary guided optical path; - at least an optical amplifier; - a modulation device, up-line from the said protected portion of the said first primary guided optical path, for transmitting a first overmodulation frequency along the said protected portion; - a detection device, down-line from the said protected portion of the said first primary guided optical path, for detecting the presence or absence of the said first overmodulation frequency; and - an operating device, down-line from the said protected portion of the said first primary guided optical path, connected operationally to the said first secondary guided optical path; the said first transmitter sending at least one optical signal at least along the said first primary guided optical path and the said first receiver receiving the said at least one optical signal, in which, when the said detection device detects the absence of the said first overmodulation frequency in the said protected portion of the said first primary guided optical path, the said operating device enables the said optical signal to be propagated along the said first secondary guided optical path up to the said first receiver.

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