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


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: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
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
Publication ISSN: 1873-0310
Last Modified: 18 Mar 2024 08:14
Date Deposited: 16 Jun 2015 11:15
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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 (ORCID Profile 0000-0001-6107-3439)
Sun, Zhongyuan
Zhou, Kaiming (ORCID Profile 0000-0002-6011-1912)
Wang, Hushan
Wang, Yishan
Zhao, Wei
Zhang, Lin (ORCID Profile 0000-0002-1691-5577)

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