Nizar, S.M.Elizabeth Caroline, E.C.Krishnan, P.2026-02-042022Microsystem Technologies, 2022, 28, 9, pp. 2023-20359467076https://doi.org/10.1007/s00542-022-05341-5https://idr.nitk.ac.in/handle/123456789/22428Three different Photonic Crystal Fiber (PCF) gas sensors are designed to detect five different gases for a wide range of wavelengths. The three unique configurations are designed based on four outer Elliptical cores PCF (4E-PCF), four outer Circular cores (4C-PCF) PCF, and different Eight Elliptical cores PCF (8E-PCF) to analyze and sense the light interface with applied gases. For three proposed gas sensors, the sensing parameters for five different hazardous gases, such as relative sensitivity, effective area, birefringence and dispersion, are acquired. The five different gases considered in the sensor investigation are Sulfur trioxide [SO<inf>3</inf>] (20 °C), Tetracholorosilane [SiCl<inf>4</inf>], Tetracholoromethane [CCl<inf>4</inf>], Turpentine [C<inf>10</inf>H<inf>16</inf>], Tin Terra chloride [SnCl<inf>4</inf>]. Among the three designs, 8E-PCF yields a maximum sensitivity of 75.75%, an effective area of 2.45μm2, and a birefringence of 0.0421 for SnCl<inf>4</inf> gas. © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.BirefringenceChemical sensorsCrystal whiskersGas detectorsGasesHazardsPhase interfacesPhotonic crystal fibersTin compoundsDifferent gasEffective areaEffective dispersionElliptical coreFibre yieldsGas-sensorsHazardous gasPhotonic crystal fiber sensorsPhotonic-crystal fiberRelative sensitivityChlorine compounds