An integrated detection based on a multi-parameter plasmonic optical fiber sensor

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Abstract

In this paper, a multi-parameter integrated detection photonic crystal fiber (PCF) sensor based on surface plasmon resonance (SPR) is proposed for its application in detecting temperature, magnetic field, and refractive index. The air holes on both sides of the fiber core were coated with gold film and introduced to the temperature-sensitive medium (PDMS) and magnetic fluid (MF), detecting temperature and magnetic field, respectively. The graphene layer is also presented on the gold film of the D-type side polished surface to improve the sensor sensitivity. The sensor’s critical parameters’ influence on its performance is investigated using a mode solver based on the finite element method (FEM). Simulation results show when the samples refractive index (RI) detection is a range of 1.36~1.43, magnetic field detection is a range of 20~550 Oe, and the temperature detection is a range of 5~55 °C; the maximum sensor’s sensitivity obtains 76,000 nm/RIU, magnetic field intensity sensitivity produces 164.06 pm/Oe, and temperature sensitivity obtains -5001.31 pm/°C.

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Xiao, G., Ou, Z., Yang, H., Xu, Y., Chen, J., Li, H., … Li, J. (2021). An integrated detection based on a multi-parameter plasmonic optical fiber sensor. Sensors (Switzerland), 21(3), 1–14. https://doi.org/10.3390/s21030803

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