Dynamic fiber-optic shape sensing using fiber segment interferometry

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dc.contributor.authorKissinger, Thomas
dc.contributor.authorChehura, Edmond
dc.contributor.authorStaines, Stephen E.
dc.contributor.authorJames, Stephen W.
dc.contributor.authorTatam, Ralph P.
dc.date.accessioned2017-09-25T11:55:23Z
dc.date.available2017-09-25T11:55:23Z
dc.date.issued2017-09-12
dc.description.abstractDynamic fiber-optic shape sensing, often also referred to as curvature or bend sensing, is demonstrated using fiber segment interferometry, where chains of fiber segments, separated by broadband Bragg grating reflectors, are interrogated using range-resolved interferometry. In this work, the theory of interferometric curvature sensing using fiber segments is developed in detail, including techniques to infer lateral displacements from the measured differential strain data and methods for directional calibration of the sensor. A proof-of-concept experiment is performed, where four fiber strings, each containing four fiber segments of gauge length 20 cm each, are attached to the opposing sides of a flexible support structure and the resulting differential strain measurements are used to determine the lateral displacements of a 0.8 m cantilever test object in two dimensions. Dynamic tip displacement measurements at 40nm . HZ-0.5 noise levels over a 21 kHz bandwidth demonstrate the suitability of this approach for highly sensitive and cost-effective fiber-optic lateral displacement or vibration measurements.en_UK
dc.identifier.citationKissinger T, Chehura E, Staines SE, et al., (2018) Dynamic fiber-optic shape sensing using fiber segment interferometry. Journal of Lightwave Technology, Volume 36, Issue 4, February 2018, pp. 917-925en_UK
dc.identifier.cris18417485
dc.identifier.issn0733-8724
dc.identifier.urihttp://dx.doi.org/10.1109/JLT.2017.2750759
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/12545
dc.language.isoenen_UK
dc.publisherIEEEen_UK
dc.rightsAttribution 3.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/
dc.subjectOptical fiber sensorsen_UK
dc.subjectOptical interferometryen_UK
dc.subjectVibrometersen_UK
dc.subjectShape measurementen_UK
dc.subjectCondition monitoringen_UK
dc.titleDynamic fiber-optic shape sensing using fiber segment interferometryen_UK
dc.typeArticleen_UK

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