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Title: Simultaneous measurement of temperature and curvature using ring-core fiber-based mach-zehnder interferometer
Authors: Yuan, W 
Zhao, Q 
Li, L 
Wang, Y 
Yu, C 
Issue Date: Jun-2021
Source: Optics express, 7 June 2021, v. 29, no. 12, p. 17915-17925
Abstract: In this paper, the Mach-Zehnder interferometer (MZI) based on ring-core fiber was proposed and manufactured. Benefiting from the identical diameters of ring-core fiber, no-core fiber, and single-mode fiber, the MZI fiber sensor can be prototyped by sandwiching the ring-core fiber between the no-core fiber and the single-mode fiber (SMF). With the proposed specific structure of the ring-core fiber, the simultaneous measurement of temperature and curvature was achieved with the MZI sensor by means of monitoring the wavelength shift of interference dips. Experimental results have shown that the sensitivity of curvature sensing could reach up to -3.68 nm/m-1 in the range from 1.3856 m-1 to 3.6661 m-1 with high linearity of 0.9959. Meanwhile, the maximum temperature sensitivity is measured to be 72 pm/°C with a fairly good linearity response of 0.9975. In addition, by utilizing the 2×2 matrix algorithm, the dual demodulation of temperature and curvature can be readily realized for the purpose of direct sensing. It is believed that the proposed special structure-based MZI sensor may show great potential applications in the field of fiber-optics sensing and structural health monitoring (SHM).
Publisher: Optical Society of America
Journal: Optics express 
EISSN: 1094-4087
DOI: 10.1364/OE.425580
Rights: © 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement (
Journal © 2021
© 2021 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.
The following publication Yuan, W., Zhao, Q., Li, L., Wang, Y., & Yu, C. (2021). Simultaneous measurement of temperature and curvature using ring-core fiber-based Mach-Zehnder interferometer. Optics Express, 29(12), 17915-17925 is available at
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