Patent ID: 11914040
Assignee: SUBCOM, LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 16:
17. A line monitoring system, comprising:
a laser source to launch a plurality of pulsed probe signals;
a polarization rotator, disposed to rotate a polarization of the plurality of pulsed probe signals,
an optical transmission system, comprising a plurality of loopbacks, disposed to receive the plurality of pulsed probe signals, and direct the plurality of pulsed probe signals through the plurality of loopbacks;
a receiver to receive a plurality of return signals, derived from the plurality of pulsed probe signals from the optical transmission system; and
a perturbance detection system, coupled to the receiver, and arranged to:
measure a phase difference between a polarization of a pair of return signals of the plurality of return signals, the pair of return signals being received from a pair of loopbacks of the plurality of loopbacks.