Temperature-calibrated high-precision refractometer using a tilted fiber Bragg grating

Biqiang Jiang; Kaiming Zhou; Changle Wang; Yunhe Zhao; Jianlin Zhao; Lin Zhang

doi:10.1364/OE.25.025910

Temperature-calibrated high-precision refractometer using a tilted fiber Bragg grating

Biqiang Jiang^*, Kaiming Zhou, Changle Wang, Yunhe Zhao, Jianlin Zhao, Lin Zhang

^*Corresponding author for this work

College of Engineering and Physical Sciences

Research output: Contribution to journal › Article › peer-review

Abstract

We present a refractometer with main- and vernier-scale to measure the refractive index (RI) of liquids with high precision by using the fine spectrum structure of a tilted fiber Bragg grating (TFBG). The absolute RI values are determined by the accurate wavelength of cut-off mode resonances. The main- and vernier-scale are calibrated by measuring large groups of fine spectra at different cut-off mode resonances in a small RI range, and the use of vernier-scale certainly reduces the RI measurement uncertainty resulted from the discrete cladding mode resonances. The performance of the TFBG-based vernier refractometer is experimentally verified by exploring the temperature dependence of RI of anhydrous ethanol in a near infrared region, showing an enhanced accuracy to the order of 10⁻⁴, high repeatability and temperature self-calibration capability.

Original language	English
Pages (from-to)	25910-25918
Number of pages	9
Journal	Optics Express
Volume	25
Issue number	21
DOIs	https://doi.org/10.1364/OE.25.025910
Publication status	Published - 10 Oct 2017

Bibliographical note

© Copyright 2017 | The Optical Society. All Rights Reserved. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.

Funding: Marie Skłodowska-Curie Individual Fellowships in the European Union’s Horizon 2020 Research and Innovation Programme (660648); National Natural Science Foundation of China (61505165); Natural Science Basic Research Plan in Shaanxi Province of China (2016JQ6032).

Keywords

Fiber optics components
Fiber Bragg gratings;
Fiber optics sensors

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10.1364/OE.25.025910

Temperature-calibrated high-precision refractometer using a tilted fiber.._
© Copyright 2017 | The Optical Society. All Rights Reserved. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.
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abstract = "We present a refractometer with main- and vernier-scale to measure the refractive index (RI) of liquids with high precision by using the fine spectrum structure of a tilted fiber Bragg grating (TFBG). The absolute RI values are determined by the accurate wavelength of cut-off mode resonances. The main- and vernier-scale are calibrated by measuring large groups of fine spectra at different cut-off mode resonances in a small RI range, and the use of vernier-scale certainly reduces the RI measurement uncertainty resulted from the discrete cladding mode resonances. The performance of the TFBG-based vernier refractometer is experimentally verified by exploring the temperature dependence of RI of anhydrous ethanol in a near infrared region, showing an enhanced accuracy to the order of 10−4, high repeatability and temperature self-calibration capability.",

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AU - Zhao, Jianlin

AU - Zhang, Lin

N1 - © Copyright 2017 | The Optical Society. All Rights Reserved. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited. Funding: Marie Skłodowska-Curie Individual Fellowships in the European Union’s Horizon 2020 Research and Innovation Programme (660648); National Natural Science Foundation of China (61505165); Natural Science Basic Research Plan in Shaanxi Province of China (2016JQ6032).

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KW - Fiber optics sensors

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Temperature-calibrated high-precision refractometer using a tilted fiber Bragg grating

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Keywords

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