Journal
OPTICAL FIBER TECHNOLOGY
Volume 43, Issue -, Pages 1-5Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.yofte.2018.03.010
Keywords
Curvature sensor; Seven-core fiber; Influence of multimode fiber; Mach-Zehnder interference
Funding
- Natural Science Foundation of Liaoning Province [201602262]
- Fundamental Research Funds for the Central Universities [N160405001, N160408001, N150401001]
- National Science Foundation for Distinguished Young Scholars of China [61425003]
- National Natural Science Foundation of China [51607028]
- State Key Laboratory of Synthetical Automation for Process Industries [2013ZCX09]
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A sensitive curvature sensor based on MMF SCF MMF (MMF: multimode fiber; SCF: seven core fiber) structure is proposed. The multimode fiber (MMF) are used to improve the light coupling efficiency between the input singlemode fiber (SMF) and the seven-core fiber (SCF), and the seven-core fiber is used as the main element for curvature measurement. Experimental results show that the best curvature sensitivity reaches 41.46453 nm/m(-1) in the range of 0.094 m(-1)-0.567 m(-1). The temperature sensitivity is up to 59.02 pm/degrees C in the range of 20 degrees C-55 degrees C. The optical curvature sensors are widely used for buildings structure health monitoring and mechanical engineering due to the advantages of compact structure, anti-electromagnetic interference, and low cost.
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