Frequency scanned phase sensitive optical time-domain reflectometry interrogation in multimode optical fibers

Frequency scanned phase sensitive optical time-domain reflectometry interrogation in multimode optical fibers

Blog Article

Standard multimode optical fibers normally support transmission over some 100 modes.Large differences in the propagation constant and the spatial distribution of distinct modes degrade the performance of phase-sensitive optical time-domain reflectometry Headstalls and Bridles measurements.In this work, we present a new realization barrel accessories of a coherent time-domain interrogation technique using single-mode operation in multimode fibers.We demonstrate effectively distributed strain sensing on three different multimode optical fibers.Up to 4 km of multimode fiber has been correctly interrogated, featuring a spatial resolution of 20 cm.