Ultra-high-sensitivity two-dimensional bend sensor

G M H  Flockhart; W N  MacPherson; J S  Barton; C K  Kirkendall; G A  Cranch

doi:10.1049/el:20060731

Ultra-high-sensitivity two-dimensional bend sensor

G M H Flockhart, W N MacPherson, J S Barton, C K Kirkendall, G A Cranch

Electronic And Electrical Engineering

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Abstract

A multicore fibre Fabry-Perot-based strain sensor interrogated with tandem interferometry for bend measurement is described. Curvature in two dimensions is obtained by measuring the difference in strain between three co-located low finesse Fabry-Perot interferometers formed in each core of the fibre by pairs of Bragg gratings. This sensor provides a responsivity enhancement of up to 30 times that of a previously reported fibre Bragg grating based sensor. Strain resolutions of 0.6 n epsilon/Hz(1/2) above 1 Hz are demonstrated, which corresponds to a curvature resolution of similar to 0.012 km(-1)/Hz(1/2).

Original language	English
Pages (from-to)	520-522
Number of pages	3
Journal	Electronics Letters
Volume	42
Issue number	9
DOIs	https://doi.org/10.1049/el:20060731
Publication status	Published - 27 Apr 2006

Keywords

ultra high sensitivity
two dimensional
bend sensor
fibre optic sensors
strain sensors
bragg gratings
fabry-perot interferometers
curvature measurement

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10.1049/el:20060731

Cranch Ultra high sensitivity two dimensional bend sensor Elec Lett 2006Final published version, 211 KB

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title = "Ultra-high-sensitivity two-dimensional bend sensor",

abstract = "A multicore fibre Fabry-Perot-based strain sensor interrogated with tandem interferometry for bend measurement is described. Curvature in two dimensions is obtained by measuring the difference in strain between three co-located low finesse Fabry-Perot interferometers formed in each core of the fibre by pairs of Bragg gratings. This sensor provides a responsivity enhancement of up to 30 times that of a previously reported fibre Bragg grating based sensor. Strain resolutions of 0.6 n epsilon/Hz(1/2) above 1 Hz are demonstrated, which corresponds to a curvature resolution of similar to 0.012 km(-1)/Hz(1/2).",

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AU - Flockhart, G M H

AU - MacPherson, W N

AU - Barton, J S

AU - Kirkendall, C K

AU - Cranch, G A

PY - 2006/4/27

Y1 - 2006/4/27

N2 - A multicore fibre Fabry-Perot-based strain sensor interrogated with tandem interferometry for bend measurement is described. Curvature in two dimensions is obtained by measuring the difference in strain between three co-located low finesse Fabry-Perot interferometers formed in each core of the fibre by pairs of Bragg gratings. This sensor provides a responsivity enhancement of up to 30 times that of a previously reported fibre Bragg grating based sensor. Strain resolutions of 0.6 n epsilon/Hz(1/2) above 1 Hz are demonstrated, which corresponds to a curvature resolution of similar to 0.012 km(-1)/Hz(1/2).

AB - A multicore fibre Fabry-Perot-based strain sensor interrogated with tandem interferometry for bend measurement is described. Curvature in two dimensions is obtained by measuring the difference in strain between three co-located low finesse Fabry-Perot interferometers formed in each core of the fibre by pairs of Bragg gratings. This sensor provides a responsivity enhancement of up to 30 times that of a previously reported fibre Bragg grating based sensor. Strain resolutions of 0.6 n epsilon/Hz(1/2) above 1 Hz are demonstrated, which corresponds to a curvature resolution of similar to 0.012 km(-1)/Hz(1/2).

KW - ultra high sensitivity

KW - two dimensional

KW - bend sensor

KW - fibre optic sensors

KW - strain sensors

KW - bragg gratings

KW - fabry-perot interferometers

KW - curvature measurement

U2 - 10.1049/el:20060731

DO - 10.1049/el:20060731

M3 - Article

SN - 0013-5194

VL - 42

SP - 520

EP - 522

JO - Electronics Letters

JF - Electronics Letters

IS - 9

ER -

Ultra-high-sensitivity two-dimensional bend sensor

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Keywords

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