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Sensors 2013, 13(7), 8095-8102; doi:10.3390/s130708095
Article

An In-Reflection Strain Sensing Head Based on a Hi-Bi Photonic Crystal Fiber

* ,
,
 and
Department of Electric and Electronic Engineering, Universidad Pública de Navarra, Pamplona 31006, Spain
* Author to whom correspondence should be addressed.
Received: 13 May 2013 / Revised: 13 June 2013 / Accepted: 17 June 2013 / Published: 25 June 2013
(This article belongs to the Special Issue Optomechatronics)
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Abstract

A photonic crystal fiber-based sensing head is proposed for strain measurements. The sensor comprises a Hi-Bi PCF sensing head to measure interferometric signals in-reflection. An experimental background study of the sensing head is conducted through an optical backscatter reflectometer confirming the theoretical predictions, also included. A cost effective setup is proposed where a laser is used as illumination source, which allows accurate high precision strain measurements. Thus, a sensitivity of ~7.96 dB/me was achieved in a linear region of 1,200 μe.
Keywords: optical fiber sensor; photonic crystal fiber; strain sensor; interferometry optical fiber sensor; photonic crystal fiber; strain sensor; interferometry
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Rota-Rodrigo, S.; Pinto, A.M.R.; Bravo, M.; Lopez-Amo, M. An In-Reflection Strain Sensing Head Based on a Hi-Bi Photonic Crystal Fiber. Sensors 2013, 13, 8095-8102.

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