Remotely addressed optical fibre curvature sensor using multicore photonic crystal fibre

We demonstrate an all-fibre curvature sensor that uses two-core photonic crystal fibre (PCF) as the sensing element. The PCF acts as a two-beam interferometer in which phase difference is a function of curvature in the plane containing the cores. A broadband source illuminates both cores, and the sp...

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Bibliographic Details
Published in:Optics communications 2001-06, Vol.193 (1), p.97-104
Main Authors: MacPherson, W.N., Gander, M.J., McBride, R., Jones, J.D.C., Blanchard, P.M., Burnett, J.G., Greenaway, A.H., Mangan, B., Birks, T.A., Knight, J.C., Russell, P.St.J.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Crystal
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Fibre interferometer
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Integrated optics. Optical fibers and wave guides
Multicore
Optical and optoelectronic circuits
Photonic
Physics
Sensor
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
Sensors, gyros
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Summary:We demonstrate an all-fibre curvature sensor that uses two-core photonic crystal fibre (PCF) as the sensing element. The PCF acts as a two-beam interferometer in which phase difference is a function of curvature in the plane containing the cores. A broadband source illuminates both cores, and the spectrum at a single point in the far-field interferogram is recorded. Applying a three-wavelength phase recovery algorithm to the data provides an unambiguous measurement of the interferometer phase, and hence curvature.
ISSN:0030-4018
1873-0310
DOI:10.1016/S0030-4018(01)01260-3