Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac Interferometer

Shao, Li-Yang; Zhang, Xinpu; He, Haijun; Zhang, Zhiyong; Zou, Xihua; Luo, Bin; Pan, Wei; Yan, Lianshan

doi:10.3390/s16101774

Open AccessArticle

Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac Interferometer

by

Li-Yang Shao

^*

,

Xinpu Zhang

^*,

Haijun He

,

Zhiyong Zhang

,

Xihua Zou

,

Bin Luo

,

Wei Pan

and

Lianshan Yan

Center for Information Photonics & Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 611756, China

^*

Authors to whom correspondence should be addressed.

Sensors 2016, 16(10), 1774; https://doi.org/10.3390/s16101774

Submission received: 25 August 2016 / Revised: 18 October 2016 / Accepted: 20 October 2016 / Published: 24 October 2016

(This article belongs to the Section Physical Sensors)

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Abstract

An optical fiber temperature and torsion sensor has been proposed by employing the Lyot-Sagnac interferometer, which was composed by inserting two sections of high-birefringence (HiBi) fiber into the Sagnac loop. The two inserted sections of HiBi fiber have different functions; while one section acts as the temperature sensitive region, the other can be used as reference fiber. The temperature and twist sensor based on the proposed interferometer structure have been experimentally demonstrated. The experimental results show that the envelope of the output spectrum will shift with the temperature evolution. The temperature sensitivity is calculated to be −17.99 nm/°C, which is enlarged over 12 times compared to that of the single Sagnac interferometer. Additionally, the fringe visibility of the spectrum will change due to the fiber twist, and the test results reveal that the fringe visibility and twist angle perfectly conform to a Sine relationship over a 360° twist angle. Consequently, simultaneous torsion and temperature measurement could be realized by detecting the envelope shift and fringe visibility of the spectrum.

Keywords: fiber sensor; temperature and torsion sensor; Lyot-Sagnac interferometer; high-birefringence fiber

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MDPI and ACS Style

Shao, L.-Y.; Zhang, X.; He, H.; Zhang, Z.; Zou, X.; Luo, B.; Pan, W.; Yan, L. Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac Interferometer. Sensors 2016, 16, 1774. https://doi.org/10.3390/s16101774

AMA Style

Shao L-Y, Zhang X, He H, Zhang Z, Zou X, Luo B, Pan W, Yan L. Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac Interferometer. Sensors. 2016; 16(10):1774. https://doi.org/10.3390/s16101774

Chicago/Turabian Style

Shao, Li-Yang, Xinpu Zhang, Haijun He, Zhiyong Zhang, Xihua Zou, Bin Luo, Wei Pan, and Lianshan Yan. 2016. "Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac Interferometer" Sensors 16, no. 10: 1774. https://doi.org/10.3390/s16101774

APA Style

Shao, L.-Y., Zhang, X., He, H., Zhang, Z., Zou, X., Luo, B., Pan, W., & Yan, L. (2016). Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac Interferometer. Sensors, 16(10), 1774. https://doi.org/10.3390/s16101774

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac Interferometer

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