The paper deals with a new multifiber temperature sensor, based on the relationship between temperature and the refractive index of a suitable reference liquid, which replaces a part of the fiber cladding. The sensing element, the microcontroller-based hardware, and the artificial neural network (ANN)-based measurement software are described. The results of the tests carried out in the range 40/spl deg/C-110/spl deg/C showed good prototype accuracy and repeatability (both contained within /spl plusmn/0.5/spl deg/C).
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