Journal
OPTICS COMMUNICATIONS
Volume 193, Issue 1-6, Pages 97-104Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0030-4018(01)01260-3
Keywords
multicore; photonic; crystal; fibre interferometer; sensor
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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. (C) 2001 Published by Elsevier Science B.V.
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