Sunday, May 22, 2022

Time-expanded phase-sensitive optical time-domain reflectometry

Distributed optical fiber sensing (DOFS) is presently a mature know-how that permits ‘reworking’ a traditional fiber optic right into a steady array of particular person sensors, that are distributed alongside its size. Between the panoply of methods developed within the area of DOFS, these based mostly on phase-sensitive optical time-domain reflectometry (ΦOTDR) have gained an excessive amount of consideration, primarily attributable to their capability to measure pressure and temperature perturbations in actual time. These distinctive options, together with different benefits of distributed sensors (decreased weight, electromagnetic immunity and small dimension) make ΦOTDR sensors a superb resolution for monitoring giant infrastructures (like bridges and pipelines), particularly when contemplating that their price scales inversely to the variety of sensing factors, and its decision can obtain a couple of meters.
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