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Vol. 34, No. 8(3), S&M3042

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Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
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Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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Sensors and Materials, Volume 36, Number 4(1) (2024)
Copyright(C) MYU K.K.
pp. 1329-1336
S&M3601 Research Paper
https://doi.org/10.18494/SAM4832
Published: April 9, 2024

Fiber-tip-integrated High-sensitivity Refractive Index and High-precision Liquid Level Sensor Based on Surface Plasmon Resonance [PDF]

Guibin Yuan, Shufei Han, Min Yuan, Xinjun Huang, and Shengli Pu

(Received December 28, 2023; Accepted February 28, 2024)

Keywords: surface plasmon resonance, refractive index sensor, liquid level sensor, multimode-no-core fiber tip

A refractive index (RI) and liquid level sensing scheme based on a multimode-no-core fiber tip with high sensitivity and precision is proposed and experimentally demonstrated by fusing a tapered no-core fiber (NCF) with a segment of multimode fiber. A gold film is plated on the side surface of the uniform waist region of the tapered NCF to stimulate surface plasmon resonance. The as-fabricated sensor achieves RI sensitivities of 16500 and 24000 nm/RIU (refractive index unit) in the RI ranges of 1.34 to 1.38 and 1.39 to 1.41, respectively. High-precision liquid level sensing with a range from 0.1 to 2.0 mm is obtained simultaneously. The designed sensing structure in this work offers simplicity and ease of implementation, which makes it a promising option for high-sensitivity and high-precision sensing applications.

Corresponding author: Shengli Pu


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This work is licensed under a Creative Commons Attribution 4.0 International License.

Cite this article
Guibin Yuan, Shufei Han, Min Yuan, Xinjun Huang, and Shengli Pu, Fiber-tip-integrated High-sensitivity Refractive Index and High-precision Liquid Level Sensor Based on Surface Plasmon Resonance, Sens. Mater., Vol. 36, No. 4, 2024, p. 1329-1336.



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