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


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.

Publication DOI: https://doi.org/10.1364/OE.25.025910
Divisions: College of Engineering & Physical Sciences
Additional Information: © 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).
Uncontrolled Keywords: Fiber optics components,Fiber Bragg gratings; , Fiber optics sensors,Atomic and Molecular Physics, and Optics
Publication ISSN: 1094-4087
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2017-10-10
Accepted Date: 2017-10-06
Submitted Date: 2017-09-05
Authors: Jiang, Biqiang
Zhou, Kaiming (ORCID Profile 0000-0002-6011-1912)
Wang, Changle
Zhao, Yunhe
Zhao, Jianlin
Zhang, Lin (ORCID Profile 0000-0002-1691-5577)



Version: Accepted Version

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