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Microstructured PMMA POF chirped Bragg gratings for strain sensing

Min, R. ; Ortega, B. ; Broadway, C. ; Hu, X. ; Caucheteur, C. ; Bang, O. ; Antunes, P. ; Marques, C.

Optical Fiber Technology Vol. 45, Nº C, pp. 330 - 335, November, 2018.

ISSN (print): 1095-9912
ISSN (online): 1068-5200

Journal Impact Factor: 1,300 (in 2014)

Digital Object Identifier: 10.1016/j.yofte.2018.08.016

Abstract
We demonstrate a chirped microstructured polymer fiber Bragg grating based on taper technology for strain sensing application. The effective bandwidth of the grating is dependent on strain and remains practically constant in respect of temperature and humidity changes. Besides central wavelength shift measurement under temperature and humidity stable conditions with 0.902 pm/µε sensitivity, faster measurements under temperature and humidity fluctuations condition can be done by measuring the effective bandwidth of the grating.