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26 July 2011 Simultaneous temperature and refractive index sensor based on a tilted fibre Bragg grating
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Proceedings Volume 8001, International Conference on Applications of Optics and Photonics; 800124 (2011) https://doi.org/10.1117/12.892217
Event: International Conference on Applications of Optics and Photonics, 2011, Braga, Portugal
Abstract
Optical device based on a tilted fibre Bragg grating (TFBG) to perform simultaneous measurement of refractive index (RI) and temperature is proposed. Using two different demodulating techniques, namely monitoring the core mode wavelength and the area of the transmission spectrum, it is possible to measure, separately, temperature and RI, respectively. The proposed method uses a grating, which does not require a reduced diameter, and a single measurement equipment. Measurements with resolution up to 5.7 x 10-4 and 0.5 °C were achieved, for RI and temperature, respectively. Theoretically, the resolution of RI measurements can go as bellow as 2 x 10-5.
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Nélia J. Alberto, Carlos A.. Marques, João L. Pinto, and Rogério N. Nogueira "Simultaneous temperature and refractive index sensor based on a tilted fibre Bragg grating", Proc. SPIE 8001, International Conference on Applications of Optics and Photonics, 800124 (26 July 2011); https://doi.org/10.1117/12.892217
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