Simultaneous Vector Bend and Temperature Sensing Based on a Polymer and Silica Optical Fibre Grating Pair

Binbin Yan; Guoqiang Liu; Jun He; Yanhua Luo; Liwei Yang; Haifeng Qi; Xinzhu Sang; Kuiru Wang; Chongxiu Yu; Jinhui Yuan; Gang-Ding Peng

doi:10.3390/s18103507

Simultaneous Vector Bend and Temperature Sensing Based on a Polymer and Silica Optical Fibre Grating Pair

Sensors (Basel). 2018 Oct 17;18(10):3507. doi: 10.3390/s18103507.

Authors

Binbin Yan¹, Guoqiang Liu², Jun He³, Yanhua Luo^{4

5}, Liwei Yang⁶, Haifeng Qi⁷, Xinzhu Sang⁸, Kuiru Wang⁹, Chongxiu Yu¹⁰, Jinhui Yuan¹¹, Gang-Ding Peng¹²

Affiliations

¹ State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China. yanbinbin@bupt.edu.cn.
² State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China. guoqiangbupt@foxmail.com.
³ Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China. hejun07@szu.edu.cn.
⁴ Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China. yanhua.luo1@unsw.edu.au.
⁵ Photonics & Optical Communications, School of Electrical Engineering, University of New South Wales, Sydney, NSW 2052, Australia. yanhua.luo1@unsw.edu.au.
⁶ College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China. yangliwei@cau.edu.cn.
⁷ Laser Institute, QiLu University of Technology (Shandong Academy of Sciences), Jinan 250014, China. qihf@sdlaser.cn.
⁸ State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China. xzsang@bupt.edu.cn.
⁹ State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China. krwang@bupt.edu.cn.
¹⁰ State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China. cxyu@bupt.edu.cn.
¹¹ State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China. yuanjinhui81@163.com.
¹² Photonics & Optical Communications, School of Electrical Engineering, University of New South Wales, Sydney, NSW 2052, Australia. g.peng@unsw.edu.au.

Abstract

The bending response of polymer optical fibre Bragg grating (POFBG) and silica optical fibre Bragg grating (SOFBG) mounted on a brass beam have been systematically studied and compared. The results indicate that POFBG has higher (almost twice as much) bend sensitivity than SOFBG. Based on the difference between the bend and temperature sensitivity of POFBG and SOFBG, a new method of measuring vector bend and temperature simultaneously was proposed by using a hybrid sensor head with series connection of one POFBG and one SOFBG with different Bragg wavelengths. It provides high sensitivity and resolution for sensing bend and temperature changes simultaneously and independently. The proposed sensor can find some applications in the fields where high sensitivity for both bend and temperature measurements are required.

Keywords: fibre Bragg grating; polymer fibre grating; silica fibre grating; simultaneous sensing; temperature sensing; vector bend sensing.