SYSTEMS AND METHODS FOR DETECTION OF INTRUSION IN OPTICAL FIBER
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United States of America Patent
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Issued Date -
Apr 7, 2016
app pub date -
Oct 7, 2015
filing date -
Oct 7, 2015
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Abstract
Techniques for detecting intrusion in an optical fiber can be realized as a method comprising: receiving an optical signal; demultiplexing the received optical signal into one or more payload data signals, a first control signal, and a second control signal; comparing a ratio of power levels of the first and second control signals with a threshold ratio; comparing the power level of the control first signal with a first threshold power value and the second control signal with a second threshold power value if the ratio of the power levels of the first and second control signals exceeds the threshold ratio; and generating an intrusion alarm signal, if the first signal is below the first threshold power value and the second signal is below the second threshold power value.
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