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Sensors 2012, 12(12), 17497-17503; doi:10.3390/s121217497

Micro-Displacement Sensor Based on a Hollow-Core Photonic Crystal Fiber

1
Departamento de Ingeniería Eléctrica y Electrónica, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona-Navarra, Spain
2
Instituto de Engenharia de Sistemas e Computadores do Porto (INESC Porto), Departamento de Física, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
*
Author to whom correspondence should be addressed.
Received: 15 October 2012 / Revised: 3 December 2012 / Accepted: 12 December 2012 / Published: 17 December 2012
(This article belongs to the Special Issue Photonic Crystal Sensors)
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Abstract

A sensing head based on a hollow-core photonic crystal fiber for in-reflection measurement of micro-displacements is presented. The sensing structure takes advantage of the multimodal behavior of a short segment of hollow-core photonic crystal fiber in-reflection, being spliced to a single mode fiber at its other end. A modal interferometer is obtained when the sensing head is close to a mirror, through which displacement is measured. View Full-Text
Keywords: fiber optic sensor; photonic crystal fiber; micro-displacement sensor; modal interferometer fiber optic sensor; photonic crystal fiber; micro-displacement sensor; modal interferometer
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Pinto, A.M.R.; Baptista, J.M.; Santos, J.L.; Lopez-Amo, M.; Frazão, O. Micro-Displacement Sensor Based on a Hollow-Core Photonic Crystal Fiber. Sensors 2012, 12, 17497-17503.

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