2022
DOI: 10.1364/ol.453620
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Distributed vibration sensor based on mode coupling in weakly coupled few-mode fibers

Abstract: In recent years, optical fiber distributed vibration sensors (DVSs) have received extensive investigation and play a significant role in different applications, such as structural health monitoring. In this Letter, we propose for the first time, to the best of our knowledge, a DVS mechanism based on linearly polarized mode coupling in weakly coupled few-mode fibers (FMFs), in which dynamic transverse stress induced by external vibration is measured with quantifiable and spatially resolvable mode coupling along… Show more

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Cited by 10 publications
(1 citation statement)
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“…Multimode platforms enable the generalization of the time-to-position mapping principles to co-propagating designs, provided that the carried modes/supermodes are weakly coupled and possess different group velocities. This mapping can be observed in reports on the characterization of multimode links and devices [38][39][40][41], as well as a recent sensing work which proposed the measurement of changes in the local coupling strength as a way to monitor the distribution of transverse stresses applied to the fiber [6,42]. Yet, more relevant sensing quantities such as strain/temperature remain unexplored, and no sensing demonstration to our knowledge has relied on the baseline coupling and intermode/intercore crosstalk for interrogation -instead, it has been considered as one of the the main drawbacks of few-mode fibers (FMF) for sensing purposes [29].…”
Section: Introductionmentioning
confidence: 93%
“…Multimode platforms enable the generalization of the time-to-position mapping principles to co-propagating designs, provided that the carried modes/supermodes are weakly coupled and possess different group velocities. This mapping can be observed in reports on the characterization of multimode links and devices [38][39][40][41], as well as a recent sensing work which proposed the measurement of changes in the local coupling strength as a way to monitor the distribution of transverse stresses applied to the fiber [6,42]. Yet, more relevant sensing quantities such as strain/temperature remain unexplored, and no sensing demonstration to our knowledge has relied on the baseline coupling and intermode/intercore crosstalk for interrogation -instead, it has been considered as one of the the main drawbacks of few-mode fibers (FMF) for sensing purposes [29].…”
Section: Introductionmentioning
confidence: 93%