Cost effective refractive index sensor based on optical fiber micro cavities produced by the catastrophic fuse effect


We propose a refractive index optical fiber sensor based on the micro cavities generated through the fiber catastrophic fuse effect. This sensor was tested in the measurement of solutions with refractive indices ranging from 1.3320 to 1.4280. The linear dependence of the reflection spectra modulation period as function of the surrounding environment refractive index leads to a resolution of 3 x 10 (4) RIU. The proposed sensor is an innovative solution based on optical fiber damaged by the fuse effect, resulting in a cost effective solution. (C) 2015 Elsevier Ltd. All rights reserved.



subject category

Engineering; Instruments & Instrumentation


Domingues, MF; Antunes, P; Alberto, N; Frias, R; Ferreira, RAS; Andre, P

our authors


This work was financed by Fundacao para a Ciencia e Tecnologia, through the strategic projects, UID/EEA/50008/2013 and UID/CTM/50011/2013. M. Fatima Domingues, Nelia Alberto and Paulo Antunes acknowledge Fundacao para a Ciencia e Tecnologia (FCT) for the Postdoctoral fellowships SFRH/BPD/101372/2014, SFRH/BPD/78141/2011, and SFRH/BPD/76735/2011, respectively.

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