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Title: Non-invasive human vital signs monitoring based on twin-core optical fiber sensors
Authors: Tan, FZ 
Chen, SY 
Lyu, WM 
Liu, ZY 
Yu, CY 
Lu, C 
Tam, WY 
Issue Date: 2019
Publisher: Optical Society of America
Source: Biomedical optics express, 2019, v. 10, no. 11, p. 5940-5951 How to cite?
Journal: Biomedical optics express 
Abstract: Win-core fiber (TCF)-based sensor was proposed for non-invasive vital sign monitoring, including respiration and heartbeat. The TCF was homemade and the corresponding sensor was fabricated by sandwiching single-mode fiber (SMF) on both ends. The offset distance between SMF and TCF was optimized while the length of TCF was identified from preliminary vital sign measurement results. Then, the TCF-based sensor was attached under a mattress to realize non-invasive vital sign monitoring. Both respiration and heartbeat signal can be obtained simultaneously, which is consistent with the reference signals. For further application, post-exercise physiological activitity characterization were realized based on this vital sign monitoring system. In discussion, mode coupling in TCF was analyzed and utilized for curvature sensing with achieved sensitivity as high as 18 nm/m(-1), which supported its excellent performance for vital signs monitoring. In conclusion, the TCF-based vital signs monitors can be a promising candidate for healthcare and biomedical applications.
EISSN: 2156-7085
DOI: 10.1364/BOE.10.005940
Rights: © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement (
Journal © 2019
The following publication Fengze Tan, Shuyang Chen, Weimin Lyu, Zhengyong Liu, Changyuan Yu, Chao Lu, and Hwa-Yaw Tam, "Non-invasive human vital signs monitoring based on twin-core optical fiber sensors," Biomed. Opt. Express 10, 5940-5952 (2019) is available at
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