Distributed Strain Sensor Based on Double-Wavelength phi-OTDR

We propose a new phase recovery approach in a phiOTDR based on weak fiber Bragg gratings (wFBG), utilizing two matched wavelengths. The method and an experimental setup are described. The presented experimental strain measuring results demonstrate an error of less than 5 \mu \mathrm{m}.

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Bibliographic Details
Published in2024 International Conference Laser Optics (ICLO) p. 236
Main Authors Gritsenko, T.V., Khan, R.I., Koshelev, K.I., Rubtsov, E.M., Sibirtsev, A.V., Pnev, A.B.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2024
Subjects
fiber optic sensors
Measurement by laser beam
Measurement uncertainty
Optical fibers
Optical variables measurement
Optics
phase recovery
phi-OTDR
Strain measurement
Wavelength measurement
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Summary:We propose a new phase recovery approach in a phiOTDR based on weak fiber Bragg gratings (wFBG), utilizing two matched wavelengths. The method and an experimental setup are described. The presented experimental strain measuring results demonstrate an error of less than 5 \mu \mathrm{m}.
ISSN:2642-5580
DOI:10.1109/ICLO59702.2024.10624304