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Title: Highly sensitive strain sensor based on helical structure combined with Mach-Zehnder interferometer in multicore fiber
Authors: Zhang, Hailiang
Wu, Zhifang
Shum, Perry Ping
Dinh, Xuan Quyen
Low, Chun Wah
Xu, Zhilin
Wang, Ruoxu
Shao, Xuguang
Fu, Songnian
Tong, Weijun
Tang, Ming
Keywords: Imaging and sensing
Optical sensors
Issue Date: 2017
Source: Zhang, H., Wu, Z., Shum, P. P., Dinh, X. Q., Low, C. W., Xu, Z., et al. (2017). Highly sensitive strain sensor based on helical structure combined with Mach-Zehnder interferometer in multicore fiber. Scientific Reports, 7, 46633-.
Series/Report no.: Scientific Reports
Abstract: Optical fiber sensors for strain measurement have been playing important roles in structural health monitoring for buildings, tunnels, pipelines, aircrafts, and so on. A highly sensitive strain sensor based on helical structures (HSs) assisted Mach-Zehnder interference in an all-solid heterogeneous multicore fiber (MCF) is proposed and experimentally demonstrated. Due to the HSs, a maximum strain sensitivity as high as −61.8 pm/με was experimentally achieved. This is the highest sensitivity among interferometer-based strain sensors reported so far, to the best of our knowledge. Moreover, the proposed sensor has the ability to discriminate axial strain and temperature, and offers several advantages such as repeatability of fabrication, robust structure and compact size, which further benefits its practical sensing applications.
ISSN: 2045-2322
DOI: 10.1038/srep46633
Schools: School of Electrical and Electronic Engineering 
Rights: © 2017 The Author(s) (Nature Publishing Group). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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