This thesis presents a study on the optical characteristics of hollow-core photonic crystal fibers (HC-PCFs) with a band gap cladding structure and their applications in optical fiber sensing. This 800B HC-PCF exhibited excellent optical properties and has a flexible structure, which makes them suitable for a wide range of industrial applications. Finite element simulations and structural optimization designs were conducted using the surface plasmon resonance (SPR) technique to determine the optimal performance parameters of the 800B HC-PCF. The fiber was further modified using the SPR technique to improve its practical detection capabilities. The performance of the modified fiber was observed at different stages of excitation with gold nanoparticles in the near-infrared range (NIR), where the power fraction and relative sensitivity were determined. The HC-PCF-based SPR sensor was found to be highly sensitive to glucose analytes, with maximum relative sensitivities of 96.5%, 96.2%, and 94.1% for analytes of different refractive indices and concentrations. The proposed fiber has the potential to be used in sensing applications for unknown analytes in both medical and industrial sectors and can be considered a significant tool for analyte detection due to its high sensitivity.

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Shawana Tabassum, Ph.D., Premananda Indic, Ph.D., Santosh Aryal, Ph.D.


Master of Science in Electrical Engineering