Xiao, Dongrui, Yu, Feihong, Wang, Guoqing, Shao, Liyang, Wang, Chao, Hu, Jie (2022) A new curvature sensor based on SMS fiber structure using ring-core fiber and its demodulation by microwave photonic filter. In: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021). SPIE (doi:10.1117/12.2618000) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:114708)
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| Official URL: https://doi.org/10.1117/12.2618000 |
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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<sup>-1</sup>, and the resolution is 6.774 × 10<sup>-6</sup>m<sup>-1</sup> which is the highest value up to now.
| Item Type: | Conference proceeding |
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| DOI/Identification number: | 10.1117/12.2618000 |
| Uncontrolled keywords: | Curvature sensor, microwave photonic filter, Mach-Zehnder interferometer, SMS fiber structure |
| Subjects: | T Technology > TK Electrical engineering. Electronics. Nuclear engineering |
| Institutional Unit: | Schools > School of Engineering, Mathematics and Physics > Engineering |
| Former Institutional Unit: |
There are no former institutional units.
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| Depositing User: | Chao Wang |
| Date Deposited: | 11 May 2026 11:41 UTC |
| Last Modified: | 11 May 2026 11:41 UTC |
| Resource URI: | https://kar.kent.ac.uk/id/eprint/114708 (The current URI for this page, for reference purposes) |
University of Kent Author Information
Wang, Chao.
| Creator's ORCID: |
 https://orcid.org/0000-0002-0454-8079
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