Rota Rodrigo, SergioRodrigues Pinto, Ana MargaridaBravo Acha, MikelLópez-Amo Sáinz, Manuel2014-06-202014-06-2020131424-8220128310.3390/s130708095https://academica-e.unavarra.es/handle/2454/10929A 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.application/pdfeng© 2013 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).InterferometryOptical fiber sensorPhotonic crystal fiberStrain sensorinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess