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Tilted Fibre Bragg Gratings and Phase Sensitive-Optical Low Coherence Interferometry for refractometry and liquid level sensing

A. Obaton 1 G. Laffont 2 C. Wang 1 A. Allard 1 P. Ferdinand 2, *
* Corresponding author
2 LCFO - Laboratoire Capteurs Fibres Optiques
DM2I - Département Métrologie Instrumentation & Information : DRT/LIST/DM2I
Abstract : A set-up based on an interferometric technique and including tilted Fibre Bragg Gratings has been used to provide refractive index and liquid level measurements. Such gratings have been investigated using the well-known Phase Sensitive-Optical Low Coherence Interferometry technique. This combination provides very promising refractometry sensing results, as the relative uncertainty on measurement is lower than 0.04% in the range 1.37–1.40 and shows a clear potential in liquid level sensing.
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A. Obaton, G. Laffont, C. Wang, A. Allard, P. Ferdinand. Tilted Fibre Bragg Gratings and Phase Sensitive-Optical Low Coherence Interferometry for refractometry and liquid level sensing. Sensors and Actuators A: Physical , Elsevier, 2013, 189, pp.451-458. ⟨10.1016/j.sna.2012.10.020⟩. ⟨cea-01815552⟩

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