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Vital signs monitoring using few-mode fiber-based sensors
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Paper Abstract

A vital signs monitor based on few-mode fiber (FMF) is presented in this paper. Two types of FMF, dual-mode fiber (DMF) and four-mode fiber are respectively utilized for vital signs monitoring. For DMF, core-offset distance between lead-in single mode fiber (SMF) and DMF was optimized numerically, the results of which agree very well with experiments and respiration ratio can be measured successfully with acceptable extinction ratio. For four-mode fiber, core-offset mode excitation method with optimized parameters is also utilized to excite four types of modes, LP01, LP11, LP21 and LP02, which realizes the modal interference enhancement and the extinction ratio can reach 10 dB. Breath signals can be also detected using this structure. As demonstrated in this paper, FMF-based sensor could provide a promising candidate for fiber-optic biomedical application.

Paper Details

Date Published: 5 November 2018
PDF: 7 pages
Proc. SPIE 10814, Optoelectronic Devices and Integration VII, 108140P (5 November 2018); doi: 10.1117/12.2504819
Show Author Affiliations
Shuyang Chen, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Zhenyu Huang, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Fengze Tan, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Tianyu Yang, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Jiajing Tu, The Hong Kong Polytechnic Univ. (Hong Kong, China)
The Hong Kong Polytechnic Univ. Shenzhen Research Institute (China)
Changyuan Yu, The Hong Kong Polytechnic Univ. (Hong Kong, China)


Published in SPIE Proceedings Vol. 10814:
Optoelectronic Devices and Integration VII
Xuping Zhang; Baojun Li; Changyuan Yu; Xinliang Zhang, Editor(s)

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