Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac Interferometer
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 act...
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doaj-2f33ffb36fa4483788ab7d2132b4e0602020-11-25T01:29:27ZengMDPI AGSensors1424-82202016-10-011610177410.3390/s16101774s16101774Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac InterferometerLi-Yang Shao0Xinpu Zhang1Haijun He2Zhiyong Zhang3Xihua Zou4Bin Luo5Wei Pan6Lianshan Yan7Center for Information Photonics & Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 611756, ChinaCenter for Information Photonics & Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 611756, ChinaCenter for Information Photonics & Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 611756, ChinaCenter for Information Photonics & Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 611756, ChinaCenter for Information Photonics & Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 611756, ChinaCenter for Information Photonics & Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 611756, ChinaCenter for Information Photonics & Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 611756, ChinaCenter for Information Photonics & Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 611756, ChinaAn 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.http://www.mdpi.com/1424-8220/16/10/1774fiber sensortemperature and torsion sensorLyot-Sagnac interferometerhigh-birefringence fiber |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Li-Yang Shao Xinpu Zhang Haijun He Zhiyong Zhang Xihua Zou Bin Luo Wei Pan Lianshan Yan |
spellingShingle |
Li-Yang Shao Xinpu Zhang Haijun He Zhiyong Zhang Xihua Zou Bin Luo Wei Pan Lianshan Yan Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac Interferometer Sensors fiber sensor temperature and torsion sensor Lyot-Sagnac interferometer high-birefringence fiber |
author_facet |
Li-Yang Shao Xinpu Zhang Haijun He Zhiyong Zhang Xihua Zou Bin Luo Wei Pan Lianshan Yan |
author_sort |
Li-Yang Shao |
title |
Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac Interferometer |
title_short |
Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac Interferometer |
title_full |
Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac Interferometer |
title_fullStr |
Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac Interferometer |
title_full_unstemmed |
Optical Fiber Temperature and Torsion Sensor Based on Lyot-Sagnac Interferometer |
title_sort |
optical fiber temperature and torsion sensor based on lyot-sagnac interferometer |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2016-10-01 |
description |
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. |
topic |
fiber sensor temperature and torsion sensor Lyot-Sagnac interferometer high-birefringence fiber |
url |
http://www.mdpi.com/1424-8220/16/10/1774 |
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