A new curvature sensor based on SMS fiber structure using ring-core fiber and its demodulation by microwave photonic filter

Dongrui Xiao; Feihong Yu; Guoqing Wang; Liyang Shao; Chao Wang; Jie Hu

doi:10.1117/12.2618000

15 February 2022 A new curvature sensor based on SMS fiber structure using ring-core fiber and its demodulation by microwave photonic filter

Dongrui Xiao, Feihong Yu, Guoqing Wang, Liyang Shao, Chao Wang, Jie Hu

Author Affiliations +

Proceedings Volume 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021); 121667O (2022) https://doi.org/10.1117/12.2618000
Event: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 2021, Hong Kong, Hong Kong

Abstract

Curvature measurement is important in the fields of structure health monitoring, robot-pose measurement, etc. The curvature-sensor with high resolution is highly needed. In this paper, an optical curvature sensor with high resolution based on single-mode-multimode-single-mode (SMS) structure using ring core fiber (RCF) is proposed and its demodulation is realized by the microwave photonic filter (MPF). The SMS fiber structure is a typical in-fiber Mach-Zehnder interferometer (MZI). The operating principle of the proposed sensor is that different curvatures will cause the variations of the interference spectrum of the SMS-sensor, and then the variations are converted into the frequency-shift of the MPF. Theoretical analysis and experiment are verified. The measured sensitivity is -147.634 MHz/m^-1, and the resolution is 6.774 × 10^-6m^-1 which is the highest value up to now.

Citation Download Citation

Dongrui Xiao, Feihong Yu, Guoqing Wang, Liyang Shao, Chao Wang, and Jie Hu "A new curvature sensor based on SMS fiber structure using ring-core fiber and its demodulation by microwave photonic filter", Proc. SPIE 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 121667O (15 February 2022); https://doi.org/10.1117/12.2618000

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