Abstract
Basing on surface plasmon resonance technology, a micro-structured fiber temperature sensor with a simple structure is proposed. It has a three core micro-structured fiber infiltrated with temperature-sensitive material (chloroform). Moreover, an ITO film is selected as the plasmonic material to stimulate surface plasmon resonance. A large number of numerical calculations are carried out by using the full vector finite element method, and the influence of structural parameters on the temperature sensitivity is analyzed. The results show that the temperature sensitivity can be improved by reducing D1 and the ITO thickness. By optimizing the parameters, the sensor has a maximum temperature sensitivity of 18 nm/°C. Moreover, the average temperature sensitivity can reach to 17.1 nm/°C(the corresponding wavelength sensitivity is 26771.7 nm/RIU) in the temperature range from −40 °C to 0 °C, and the average temperature sensitivity is 7.07 nm/°C (the corresponding wavelength sensitivity is 11343.9 nm/RIU) in the temperature range from 0 °C to 40 °C.
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