2results about "Reflectometers dealing with polarization" patented technology

To provide spatially resolved disturbance detection using a line monitoring system.SOLUTION: The line monitoring system may include: a laser source to launch a plurality of pulsed probe signals; and an optical transmission system, comprising a plurality of loopbacks, to receive the plurality of pulsed probe signals, and direct the plurality of pulsed probe signals through the plurality of loopbacks. The system may include a receiver to receive a plurality of return signals, derived from the plurality of pulsed probe signals, from the transmission system, and a disturbance detection system coupled to the receiver and used 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 may be received from a pair of loopbacks of the plurality of loopbacks, a first loopback, and a second return signal from a second loopback. The disturbance detection system may determine a location of a disturbance, based upon the phase difference.SELECTED DRAWING: Figure 1