High-sensitivity temperature sensor based on photonic crystal fiber filled with ethanol and toluene

Abstract

Abstract A surface plasmon resonance photonic crystal fiber-based highly sensitive temperature sensor is proposed. The surface plasmon resonance is induced by injecting toluene into the central hole and ethanol into the side holes coated with gold film. The coupling mechanism and sensing performance of the proposed sensor are analyzed. The results indicate that in the sensing range of 0°C - 70 °C, the highest Figure of Merit (FOM) is 0.1169/°Cand the average temperature sensitivity can reach 7.13 nm/°C. The sensor's sensitivity is also very consistent across the entire detection range. Such temperature sensor exhibits tremendous potential in the domain of temperature detection.