Avoiding signal distortion in several classes of dynamic fiber-optic interrogators

Hari Datta Bhatta, Roy Davidi, Moshe Tur

Research output: Contribution to conferencePaperpeer-review

Abstract

Dynamic fiber-optic interrogators, which employ frequency scanning to determine measurand-induced frequency shifts (as in fiber Bragg Gratings (FBGs) and Brillouin-based interrogations), normally report their measurement results on a uniform time grid. In reality, these instruments find their reported frequency shifts on a non-uniform time grid. The resulting errors, mainly harmonic distortion and nonlinear response, are shown to increase to severe levels as the sampling rate approaches the Nyquist criterion and as the employed frequency-scanning span comes close to the measurand dynamic range. Guidelines are provided how to estimate these errors and how to choose an operating point that minimizes these distortions.

Original languageEnglish
StatePublished - 2018
Event9th European Workshop on Structural Health Monitoring, EWSHM 2018 - Manchester, United Kingdom
Duration: 10 Jul 201813 Jul 2018

Conference

Conference9th European Workshop on Structural Health Monitoring, EWSHM 2018
Country/TerritoryUnited Kingdom
CityManchester
Period10/07/1813/07/18

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