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Article

Displacement Sensor Based on a Small U-Shaped Single-Mode Fiber

1
Photonics Research Centre, Guilin University of Electronic Technology, Guilin 541004, China
2
Guangxi Key Laboratory of Automatic Detection Technology and Instrument Foundation (No.), Guilin 541004, China
3
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
*
Authors to whom correspondence should be addressed.
Sensors 2019, 19(11), 2531; https://doi.org/10.3390/s19112531
Received: 8 May 2019 / Revised: 26 May 2019 / Accepted: 30 May 2019 / Published: 3 June 2019
(This article belongs to the Section Physical Sensors)
A simple structure and easily fabricated displacement sensor was proposed and demonstrated based on a bending-induced fiber interferometer. In the design, the fiber interferometer was formed only by bending the single-mode fiber into a small U-shape without splicing, tapering, or heating pre-processing, which effectively reduces the complexity of the fabrication process, greatly enhances the mechanical strength of the sensor, and lowers the cost in the displacement sensing applications. The displacement sensing performances for the sensor with different bending radii of 3.3 mm, 4.4 mm, 5.0 mm, and 6.3 mm were investigated. Experimental results showed that the sensor had a good linear response, and for the bending radii of 3.3, 4.4, 5.0, and 6.3 mm, the proposed sensors showed high sensitivities of 134.3, 105.1, 120.9, and 144.1 pm/μm, respectively. View Full-Text
Keywords: displacement measurement; bent fiber interferometer; a small U-shape displacement measurement; bent fiber interferometer; a small U-shape
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MDPI and ACS Style

Teng, C.; Yu, F.; Deng, S.; Liu, H.; Yuan, L.; Zheng, J.; Deng, H. Displacement Sensor Based on a Small U-Shaped Single-Mode Fiber. Sensors 2019, 19, 2531. https://doi.org/10.3390/s19112531

AMA Style

Teng C, Yu F, Deng S, Liu H, Yuan L, Zheng J, Deng H. Displacement Sensor Based on a Small U-Shaped Single-Mode Fiber. Sensors. 2019; 19(11):2531. https://doi.org/10.3390/s19112531

Chicago/Turabian Style

Teng, Chuanxin, Fangda Yu, Shijie Deng, Houquan Liu, Libo Yuan, Jie Zheng, and Hongchang Deng. 2019. "Displacement Sensor Based on a Small U-Shaped Single-Mode Fiber" Sensors 19, no. 11: 2531. https://doi.org/10.3390/s19112531

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