A novel porous core photonic crystal fiber (PCF) sensor is reported for label-free detection of different concentrations of ethylene glycol present in aqueous solution, over a wavelength range from 1 to 2 μm. Both core and cladding are designed with elliptical air holes, which are arranged in a hexagonal structure with TOPAS as the background material. Various geometrical parameters are judiciously optimized to achieve an efficient sensor. Finite element analysis is employed for numerical simulation of the proposed structure, investigating various sensing parameters including effective refractive index, effective material loss, confinement loss, nonlinearity coefficient, shifts in peak reflected wavelengths, sensitivity, f-parameter, spot size and beam divergence angle. Simulation outcomes reveal a significant shift in the sensing parameters in response to changes in concentration of ethylene glycol, confirming the effectiveness of the sensor. Optimum wavelength sensitivity of 13,144.86 nm/RIU and resolution of \(7.46 \times 10^{ - 7}\) RIU are attained, which provide a significant theoretical foundation for the design of novel photonic sensors. Benchmarking of the proposed PCF sensor is done against related research results to prove its superiority in terms of resolution and sensitivity.

据报道，一种新型的多孔芯光子晶体光纤（PCF）传感器可在1至2μm的波长范围内无标记地检测水溶液中存在的不同浓度的乙二醇。纤芯和包层都设计有椭圆形的气孔，以TOPAS为背景材料以六角形结构排列。明智地优化各种几何参数，以实现高效的传感器。有限元分析用于所提出结构的数值模拟，研究各种传感参数，包括有效折射率，有效材料损耗，限制损耗，非线性系数，峰值反射波长的偏移，灵敏度，f-参数，光斑大小和光束发散角。仿真结果表明，响应于乙二醇浓度的变化，传感参数发生了重大变化，从而确认了传感器的有效性。获得了最佳的波长灵敏度13144.86 nm / RIU和分辨率（\ 7.46×10 ^ {-7} \） RIU，这为新型光子传感器的设计提供了重要的理论基础。针对相关研究结果对所提出的PCF传感器进行了基准测试，以证明其在分辨率和灵敏度方面的优越性。