Highly sensitive refractive index and magnetic field sensor based on long-period fiber grating inscribed in tapered optical fiber

Wang, Pei; Hu, Jin; Jiang, Chao; Deng, Longfeng; Hu, Chuanju; Gao, Jiawei; Li, Li; Li, Hong

doi:10.1016/j.ijleo.2023.171289

Cited by 1 publication

(1 citation statement)

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“…(1)(2)(3) Optical fiber sensing for RI measurement has been widely implemented because of its advantages of anti-electromagnetic interference, strong remote monitoring ability, and low price. (4)(5)(6)(7) Similarly, high-precision liquid level sensing is of considerable significance in chemical industry, oil storage, public water supply, and so forth. By monitoring the changes in physical quantities related to liquid level information, the remote monitoring and control of liquid level can be achieved.…”

Section: Introductionmentioning

confidence: 99%

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

Yuan,

Han,

Yuan

et al. 2024

Sensors and Materials

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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.

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