Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/119429
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Type: | Journal article |
Title: | Simultaneous measurement of temperature and refractive index using an exposed core microstructured optical fiber |
Author: | LI, X. Nguyen, L.V. Becker, M. Pham, D. Ebendorff-Heidepriem, H. Warren-Smith, S.C. |
Citation: | IEEE Journal of Selected Topics in Quantum Electronics, 2020; 26(4):1-7 |
Publisher: | Institute of Electrical and Electronics Engineers |
Issue Date: | 2020 |
ISSN: | 1077-260X 1558-4542 |
Statement of Responsibility: | Xuegang Li, Linh V. Nguyen, Martin Becker, Heike Ebendorff-Heidepriem, Dinh Pham, and Stephen C. Warren-Smith |
Abstract: | We have demonstrated a novel scheme for simultaneous measurement of temperature and refractive index by using an exposed core microstructured optical fiber (ECF). The ECF allows for high sensitivity to refractive index due to the small exposed-core, while being supported by a standard fiber diameter cladding making it robust compared to optical micro-fibers. The sensor combines a fiber Bragg grating (FBG) inscribed into the core of the ECF and a multimode Mach-Zehnder interferometer (MZI). Both the FBG and MZI are sensitive to refractive index (RI) and temperature through a combination of direct access to the evanescent field via the exposed-core, the thermo-optic effect and thermal expansion. The FBG and MZI respond differently to changes in temperature and RI, thus allowing for the simultaneous measurement of these parameters. In our experiment RI sensitivities of 5.85 nm/RIU and 794 nm/RIU, and temperature sensitivities of 8.72 pm/°C and -57.9 pm/°C, were obtained for the FBG and MZI respectively. We demonstrate that a transfer matrix approach can be used to simultaneously measure both parameters, solving the problem of temperature sensitivity of RI sensors due to the high thermo-optic coefficient of aqueous samples. |
Keywords: | Optical interferometry; optical fibers; optical sensors |
Rights: | (c) 2018 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information. |
DOI: | 10.1109/JSTQE.2019.2908557 |
Grant ID: | http://purl.org/au-research/grants/arc/CE140100003 http://purl.org/au-research/grants/arc/LP150100657 |
Published version: | http://dx.doi.org/10.1109/jstqe.2019.2908557 |
Appears in Collections: | Aurora harvest 8 IPAS publications Physics publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_119429.pdf | Accepted version | 1.11 MB | Adobe PDF | View/Open |
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