An optical torsion fiber sensor with simultaneous direction and angle measurement

Wu Yulin; Yixin Zha; Guosheng Zhang; Zixiang Zhuang; Jian Wang; Chenchen Yin; Zhigang Cao; Benli Yu

doi:10.1117/12.2500655

23 October 2018 An optical torsion fiber sensor with simultaneous direction and angle measurement

Wu Yulin, Yixin Zha, Guosheng Zhang, Zixiang Zhuang, Jian Wang, Chenchen Yin, Zhigang Cao, Benli Yu

Proceedings Volume 10821, Advanced Sensor Systems and Applications VIII; 108211E (2018) https://doi.org/10.1117/12.2500655
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

Based on the principle of Solc interferometer, an optical fiber sensor which can realize torsional direction and torsion angle measurement simultaneously is proposed in this paper. The sensor is consisted of a segment of single mode fiber (SMF), polarization maintaining fiber (PMF) and two polarizers. When the light of the broad band source is transmitted in the sensor, the interference spectra can be observed at the output of the sensor. The interference spectra of the sensor can be changed when the sensor is twisted clockwise or counter-clockwise. Because the peaks position and dips position in interference spectra are reversed when clockwise and counter-clockwise torsions are applied, the torsional direction can be judged conveniently. With the increase of the torsion angle, the extinction ratio (ER) of interference spectra will change significantly. By measuring the changes of the ER, torsion angle can be calculated easily. The highest sensitivity can reach to 0.79dB/° in the range of [-50,52°].

Citation Download Citation

Wu Yulin, Yixin Zha, Guosheng Zhang, Zixiang Zhuang, Jian Wang, Chenchen Yin, Zhigang Cao, and Benli Yu "An optical torsion fiber sensor with simultaneous direction and angle measurement", Proc. SPIE 10821, Advanced Sensor Systems and Applications VIII, 108211E (23 October 2018); https://doi.org/10.1117/12.2500655

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