A two-stage Kalman filter recovers phase at faded points in phi-OTDR, yielding about 15x denser temperature profiles than conventional faded-point removal.
Fading in heterodyne OTDR
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physics.optics 1years
2026 1verdicts
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Fully Distributed Fiber-Optic Sensing Enabled by Kalman Filtering
A two-stage Kalman filter recovers phase at faded points in phi-OTDR, yielding about 15x denser temperature profiles than conventional faded-point removal.