Computational modeling of transducer elements of temperature sensors using surface plasmon resonance in a D-shaped optical fiber

摘要

This manuscript presents computational modeling of the transducer elements of temperature sensors using the surface plasmon resonance (SPR) effect in a D-shaped single-mode fiber (SMF). The modeling is made in two independent ways: i) an analytical model based on the Fresnel's formulation and ii) a numerical model based on the finite element method. Both models describe the modulation of the transmitted optical signal within the D-shaped SMF using the attenuated total internal reflection method. Results show the modulation of the optical signal as a function of temperature on the D-shape, which is composed of a metallic thin film and liquid fluids. The obtained results show a good agreement between the models and an estimated measurement temperature resolution of 0.035 °C for an operating dynamic range of about 20 °C at different central temperatures, depending on the liquid fluid used.