Investigation of rectangular solid-core photonic crystal fiber as temperature sensor

In this article, a rectangular solid-core photonic crystal fiber (PCF) is proposed as temperature sensor. The air-holes of the PCF have been filled with Ethyl alcohol analyte. The full vector finite element method with perfectly matched layer PML is used to investigate the sensing properties. The proposed sensor is working based on changing of analyte refractive index with temperature. The simulated result shows that the confinement loss decreases from 9.505 to 0.698 dB/km as temperature of analyte increases from 20 to 120 °C at 1.5 µm for PCF of air-holes diameter 2.8 µm and pitch 3 µm. Moreover, this work presents a theoretical interpretation of controlling light within filled PCF by varying temperature.