Liquid Hydrostatic Pressure Optical Sensor Based on Micro-Cavity Produced by the Catastrophic Fuse Effect


We propose an optical fiber hydrostatic pressure sensor based on micro-cavities generated by the fiber fuse effect. The presented sensor is manufactured through the recycling of optical fiber destroyed by the fiber fuse effect, being, therefore, a cost-effective solution, when compared with other similar micro-cavity-based solutions. The developed sensor was characterized for pressures up to 20 kPa, showing a linear sensitivity coefficient of 0.47 +/- 0.03 nm . kPa(-1), for pressure values below 8 kPa. Furthermore, we propose a new theoretical model to describe the behavior of the microcavities embedded in optical fibers. This allows us to solve the discrepancies, already identified by other authors, between the experimental results and the ones attained with the flat mirrors Fabry-Perot model. By this way, we were able to describe the sensor response, within the full dynamic range.



subject category

Engineering; Instruments & Instrumentation; Physics


Domingues, MDF; Paixao, TD; Mesquita, EFT; Alberto, N; Frias, AR; Ferreira, RAS; Varum, H; Antunes, PFD; Andre, PSD

our authors


This work was supported in part by the Instituto de Telecomunicacoes under Grant UID/EEA/50008/2013, in part by the Centre for Research in Ceramics and Composite Materials-Aveiro Institute of Materials under Grant UID/CTM/50011/2013, in part by the National Funds through the Fundacao para a Ciencia e a Tecnologia (FCT)/Ministerio da Educacao e Ciencia, in part by the European Regional Development Fund under the PT2020 Partnership Agreement, and in part by CNPQ (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico) under Grant PVE/407093/2013-3. The work of M. de Fatima F. Domingues, N. Alberto, P. da Costa Antunes, and A. R. Frias was supported in part by FCT under Grant SFRH/BPD/101372/2014, Grant SFRH/BPD/78141/2011, and Grant SFRH/BPD/76735/2011, and in part by MAP-FIS (Doctoral Program in Physics from Minho, Aveiro, Porto) under Grant PD/BI/106016/2014. The work of E. Mesquita was supported by the Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior-Ministerio da Educacao do Brasil Fellowship under Grant 10023/13-5. The associate editor coordinating the review of this paper and approving it for publication was Prof. Julian C. C. Chan.

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