Hybrid tilted fiber grating based refractive index and liquid level sensing system

Yan, Zhijun, Mou, Chengbo, Sun, Zhongyuan, Zhou, Kaiming, Wang, Hushan, Wang, Yishan, Zhao, Wei and Zhang, Lin (2015). Hybrid tilted fiber grating based refractive index and liquid level sensing system. Optics Communications, 351 , pp. 144-148.


We report a refractive index (RI) and liquid level sensing system based on a hybrid grating structure comprising of a 45° and an 81° tilted fiber gratings (TFGs) that have been inscribed into a single mode fiber in series. In this structure, the 45°-TFG is used as a polarizer to filter out the transverse electric (TE) component and enable the 81°-TFG operating at single polarization for RI and level sensing. The experiment results show a lower temperature cross-sensitivity, only about 7.33 pm/°C, and a higher RI sensitivity, being around 180 nm/RIU at RI=1.345 and 926 nm/RIU at RI=1.412 region, which are significantly improved in comparison with long period fiber gratings. The hybrid grating structure has also been applied as a liquid level sensor, showing 3.06 dB/mm linear peak ratio sensitivity.

Publication DOI: https://doi.org/10.1016/j.optcom.2015.04.038
Divisions: Engineering & Applied Sciences > Aston Institute of Photonics Technology
Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Additional Information: © 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords: liquid level sensor,polarization,refractive index sensor,tilted fiber grating,Electronic, Optical and Magnetic Materials,Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Physical and Theoretical Chemistry
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2015-05-15
Published Online Date: 2015-04-24
Authors: Yan, Zhijun
Mou, Chengbo ( 0000-0001-6107-3439)
Sun, Zhongyuan
Zhou, Kaiming ( 0000-0002-6011-1912)
Wang, Hushan
Wang, Yishan
Zhao, Wei
Zhang, Lin ( 0000-0002-1691-5577)

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