AUTHOR=Hossain Md. Bellal , Kříž Jan , Dhasarathan Vigneswaran , Rahaman Md. Ekhlasur 

TITLE=Photonic crystal fiber (PhCF) for petrochemical sensing

JOURNAL=Frontiers in Physics

VOLUME=10

YEAR=2023

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2022.1097841

DOI=10.3389/fphy.2022.1097841

ISSN=2296-424X

ABSTRACT=<p>A square-core photonic crystal fiber (PhCF) has been presented for liquid (petrochemical) sensing application. The sensor performance has been studied numerically in the frequency range from 1.2 to 3.8 THz. The core hole is filled with pure petrol, kerosene, and diesel. Strut size is varied to explore the sensor’s performance and the analysis is performed in terahertz (THz) frequencies. The photonic crystal fiber sensor shows a relative sensitivity of around 97.0% and a confinement loss in the order of 10<sup>−14</sup> at 3.7 THz. This photonic crystal fiber sensor can be fabricated using extrusion and 3D-printing technologies.</p>