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

Zhijun Yan, Chengbo Mou, Zhongyuan Sun, Kaiming Zhou, Hushan Wang, Yishan Wang, Wei Zhao, Lin Zhang

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)144-148
Number of pages5
JournalOptics Communications
Volume351
Early online date24 Apr 2015
DOIs
Publication statusPublished - 15 May 2015

Fingerprint

liquid levels
Refractive index
gratings
refractivity
fibers
Fibers
Liquids
Single mode fibers
sensitivity
polarizers
Polarization
Sensors
filters
sensors
polarization
Experiments

Bibliographical note

© 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

  • liquid level sensor
  • polarization
  • refractive index sensor
  • tilted fiber grating

Cite this

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

In: Optics Communications, Vol. 351, 15.05.2015, p. 144-148.

Research output: Contribution to journalArticle

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AU - Sun, Zhongyuan

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AU - Wang, Hushan

AU - Wang, Yishan

AU - Zhao, Wei

AU - Zhang, Lin

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