Abstract
A surface plasmon resonance temperature sensor based on a side opening hollow-core microstructured optical fiber is proposed in this paper. This design employs a gold nanowire to excite the plasmon mode, and can be easily filled with the sensing medium through the side opening of the fiber, which not only simplifies the fabrication of the sensor but can also use the high refractive index sensing medium. The coupling characteristics, sensing performance and fabrication tolerance of the sensor are analyzed by using the finite element method. The simulation results indicate that the maximum sensitivity is 3.21 nm/°C for the x-polarized core mode in the temperature range of 13.27–50.99 °C, and 4.98 nm/°C for the y-polarized core mode in the temperature range of 14.55–51.19 °C, when benzene is used as the sensing medium. The sensor also shows a good stability in the range of ±10% fabrication tolerance.
Highlights
Surface plasmon resonance (SPR) has high sensitivity to refractive index (RI) changes, which makes it useful for the detection of physical, chemical and biological quantities [1,2,3,4,5,6,7,8]
1a, the hollow core of the microstructured optical fibers (MOF)-SPR sensor is surrounded by a doublelayered hexagonal airtheholes
A slot is cut along the length of the fiber to connect the outside and the hollow core, which can by filling process of the medium
Summary
Lei Zhao 1 , Haixia Han 1 , Nannan Luan 1, *, Jianfei Liu 1 , Li Song 1 and Yongsheng Hu 2.
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