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Fabrication of a helical structure on a commercial plastic optical fiber for refractive index sensing
Author(s): Peng Xue; Fangda Yu; Bingcheng Wu; Haiyang Bao; Jie Zheng
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Paper Abstract

In this paper, a helical structure is fabricated on a commercial plastic optical fiber (POF) by heat pressing and twisting method. The helical POF is proposed as a RI sensor. A POF is firstly heated and pressed to form a flat-shape with a thickness of 60% of the diameter of the POF. After that, the flat-shape is twisted into a helical structure. The helical structures fabricated on POFs (with diameters of 0.25, 0.50, and 1.00 mm) and with lengths (of 10, 15, and 20mm) are experimentally evaluated for liquid RI measurement, and the results show that when the helical structure is fabricated on the POF with a diameter of 1.00 mm, a helical pitch of 2mm, and a length of 15mm, the RI sensitivities of 2292%/RIU, 4128%/RIU, and 1750%/RIU are obtained in the RI ranges of 1.33-1.37, 1.37-1.40, and 1.41-1.45, respectively. The experiment results have demonstrated that the proposed sensor is a low-cost solution for RI measurement, and with the features of high sensitivity, simple structure, easy fabrication, compact size and intensity modulation at visible wavelengths.

Paper Details

Date Published: 20 November 2019
PDF: 6 pages
Proc. SPIE 11191, Advanced Sensor Systems and Applications IX, 111910X (20 November 2019); doi: 10.1117/12.2537187
Show Author Affiliations
Peng Xue, Jilin Univ. (China)
Fangda Yu, Beihua Univ. (China)
Bingcheng Wu, Jilin Univ. (China)
Haiyang Bao, Jilin Univ. (China)
Jie Zheng, Jilin Univ. (China)


Published in SPIE Proceedings Vol. 11191:
Advanced Sensor Systems and Applications IX
Tiegen Liu; Gang-Ding Peng; Zuyuan He, Editor(s)

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