Design and Evaluation of Liquid Filled PCF Temperature Sensor Based on SPR

A hollow fiber (HF) with liquid core temperature sensor based on surface plasmon resonance (SPR) is analyzed by using finite element method (FEM). To ensure total internal reflection (TIR) two types of sensing medium namely benzene and CS
₂
is sealed into the hollow core of the fiber through side opening because of their high refractive index and temperature co-efficient properties. Gold and graphene is used to generate surface plasmon wave and deposited outside layer of the sensor separately. By considering gold as plasmonic medium, the performance of the sensor is investigated using benzene and CS
₂
as sensing medium separately. It is found from the simulation result that maximum sensitivity is 2 nm/°C for benzene as sensing medium in the temperature range of 0 °C to 50 °C and 2.5 nm/°C for CS
₂
as sensing medium in the temperature range of 60 °C to 90 °C. Similarly, considering graphene as plasmonic medium and benzene as sensing medium the sensitivity is analyzed and found 0.5 nm/°C that is lower in value. Moreover, the fabrication tolerance in both cases are also analyzed and is shown excellent stability for ±10% tolerance label.