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Title: Fabry-Perot cavity based on polymer FBG as refractive index sensor
Authors: Ferreira,MFS
Statkiewiez Barabach,G
Orlando Frazão
Issue Date: 2017
Abstract: The use of a polymer fiber as a refractive index sensor is proposed. A fiber Bragg grating is inscribed near the fiber tip and the fiber is cut shorter thus creating a Fabry-Perot cavity. The reflections between the fiber Bragg grating and the fiber end-face create a Fabry-Perot interferometer. The sensor was characterized to refractive index changes at constant temperature and to temperature at constant refractive index using a fast Fourier transform analysis of the interference signal. The sensor revealed a sensitivity of-1. 94 RIU-1 with a resolution of lx10(-3)RITJ and low sensitivity to temperature, with a cross sensitivity to temperature of 3. 6x10(-4)RIU/degrees C.
metadata.dc.type: article
Appears in Collections:Non INESC TEC publications - Articles in International Journals

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