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16 January 2019 Investigation of a plastic optical fiber imprinted with V-groove structure for displacement sensing
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A low cost and easily fabricated plastic optical fiber (POF) displacement sensor is presented. The sensor is based on the macrobending POF with a V-groove structure fabricated by a simple die-press-print method, which is easy to implement and effectively reduces the complexity of the fabrication process. The intensity modulation method is adopted for displacement sensing, which lowers the sensor system’s cost and complexity. Experiments are carried out to investigate the influence of the structural parameters on the displacement sensing performance and the proposed POF probe is optimized by changing the structure parameters. Results showed that when the V-groove structure depth is 200  μm, the length is 22 mm, the angle is 60 deg, the pitch is 2 mm, and the macrobending radius of the POF probe is 15 mm, the highest sensitivity could reach to 3.19  ×  10  −  2  /  mm with the measurement range of 18 mm.
© 2019 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2019/$25.00 © 2019 SPIE
Chuanxin Teng, Shijie Deng, Hongchang Deng, Hongyan Yang, Yonghui Xu, Libo Yuan, Jie Zheng, and Houquan Liu "Investigation of a plastic optical fiber imprinted with V-groove structure for displacement sensing," Optical Engineering 58(7), 072002 (16 January 2019).
Received: 1 September 2018; Accepted: 29 November 2018; Published: 16 January 2019

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