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Proceedings Paper

Ultrahigh sensitive twist sensor employing Sagnac interferometer based on PM-elliptical core fibers
Author(s): Binbin Song; Bo Liu; Wei Lin; Yinping Miao; Hao Zhang; Jixuan Wu; Haifeng Liu; Donglin Yan
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Paper Abstract

An ultrasensitive optical fiber twist sensor is proposed by employing a Sagnac interferometer based on polarization-maintaining elliptical core fibers (PM-ECFs). The twist effects are theoretically analyzed and experimentally demonstrated. Based on the photoelastic effect, the wavelength shift in response to twist rate turns out linear tendency and is torsion-direction-dependent. The maximum torsion sensitivity reaches 18.59593nm/(rad/m) (or 0.67582nm/°) for clockwise (CW) torsion direction and 15.83073nm/(rad/m) for anticlockwise (ACW) torsion direction, respectively. Furthermore, it is further improved up to 1.675 nm/° by rotating two ends of PM-ECF simultaneously. The prominent advantage of ultrasensitivity keep it meritorious in the applications of spaceflight and constructional engineering.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963453 (28 September 2015); doi: 10.1117/12.2190828
Show Author Affiliations
Binbin Song, Nankai Univ. (China)
Bo Liu, Nankai Univ. (China)
Wei Lin, Nankai Univ. (China)
Yinping Miao, Tianjin Univ. of Technology (China)
Hao Zhang, Nankai Univ. (China)
Jixuan Wu, Tianjin Univ. of Technology (China)
Haifeng Liu, Nankai Univ. (China)
Donglin Yan, Nankai Univ. (China)


Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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