Highly efficient compact temperature sensor using liquid infiltrated asymmetric dual elliptical core photonic crystal fiber

Abstract

We propose a novel temperature sensor based on asymmetry in dual elliptical core photonic crystal fiber (DECPCF) structure featuring an enhanced sensitivity with wide detecting range over small distances. As we are interested in constructing compact temperature sensor, we put forth a novel design of asymmetric DECPCF where the core is infiltrated by chloroform. To accomplish the proposed aim, we consider the thermo-optic coefficient of chloroform and silica to anlayse the temperature dependent propagation characteristics of the proposed DEPCF. The unique property of temperature dependent effective refractive index has been exploited to tune coupling length and transmission spectrum, using finite element method. The subsequent calculation of transmission spectrum shows a temperature sensitivity of 42.99 nm/°C at 1.41 cm in the proposed asymmetric DECPCF.