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Strain, temperature, moisture, and transverse force sensing using fused polymer optical fibers

LEAL-JUNIOR, A. ; Frizera-Neto, A. Frizera-Neto ; Lee, H. ; Mizuno, Y. ; Nakamura, K. ; Marques, C. ; Leitão, C. Leitão ; Paixão, T. Paixão ; Domingues, M. F. ; Antunes, P. ; Alberto, N. ; André, P.S ; Pontes, M. J.

Optics Express Vol. 26, Nº 10, pp. 12939 - 12947, May, 2018.

ISSN (print): 1094-4087
ISSN (online): 1094-4087

Journal Impact Factor: 3,488 (in 2014)

Digital Object Identifier: 10.1364/OE.26.012939

This paper presents the characterization of polymer optical fibers (POFs) submitted to the catastrophic fuse effect towards intensity-variation-based sensing of strain, transverse force, temperature, and moisture. In the experiments, POFs with and without the fuse effect are tested and the results are compared with respect to the sensitivity, linearity, and root mean squared error (RMSE). The fused POFs have higher linearity and lower RMSE than nonfused POFs in strain and transverse force sensing. Also, the sensitivity of the fused POFs is higher in transverse force and temperature sensing, which can be related to the higher sensitivity to the curvature that the transverse force creates on the POF and to the more significant variations of the refractive index with temperature increase. Additionally, the fused POFs present lower moisture absorption than the non-fused POFs. The presented results indicate a great potential of the fused POFs intensity variation-based sensing applications of
various physical parameters.