Abstract

We proposed and experimentally demonstrated a temperature- and strain-insensitive twist sensor based on a hybrid fiber grating structure, in which the hybrid grating structure is constructed with a 45°-tilted fiber grating and a chirped fiber Bragg grating UV-inscribed in a single-mode fiber in series. The sensing performance has been evaluated by experimental and numerical analyses, which are in good consistency. The experimental results show that the hybrid-grating-structure-based twist sensor has a maximum twist sensitivity up to 15.037 dB/rad. Moreover, due to the invariability of the fiber birefringence and the state of polarization of the input light, such sensor has intrinsically low temperature and strain sensitivities of $7.86\times {10}^{-3}\mathrm{dB}/°\mathrm{C}$ and $6.7\times {10}^{-5}\mathrm{dB}/\mathrm{\mu \epsilon }$, corresponding to the maximum twist measurement error resulting from temperature and strain of $5.2\times {10}^{-4}\mathrm{rad}/°\mathrm{C}$ and $4.5\times {10}^{-6}\mathrm{rad}/\mathrm{\mu \epsilon }$, respectively.

© 2019 Optical Society of America

Experimental and theoretical study of the in- fiber twist sensor based on quasi-fan Solc structure filter

Chunran Sun, Muguang Wang, and Shuisheng Jian
Opt. Express 25(17) 19955-19965 (2017)

Novel temperature-independent microfiber sensor fabricated with the tapering-twisting-tapering technique

Yuhao Qian, Bing Sun, Hongdan Wan, and Zuxing Zhang
Appl. Opt. 58(12) 3091-3096 (2019)

Strain independent twist sensor based on uneven platinum coated hollow core fiber structure

Dejun Liu, Qiang Wu, Wei Han, Fangfang Wei, Fengzi Ling, Rahul Kumar, Arun Kumar Mallik, Ke Tian, Changyu Shen, Gerald Farrell, Yuliya Semenova, and Pengfei Wang
Opt. Express 27(14) 19726-19736 (2019)

High temperature strain sensor based on a fiber Bragg grating and rhombus metal structure

Liang Zhang, Yueming Liu, Xiaoliang Gao, and Zhongcheng Xia
Appl. Opt. 54(28) E109-E112 (2015)

Simultaneous strain and temperature measurement by cascading few-mode fiber and single-mode fiber long-period fiber gratings

Li Wang, Weigang Zhang, Biao Wang, Lei Chen, Zhiyong Bai, Shecheng Gao, Jieliang Li, Yongji Liu, Liyu Zhang, Quan Zhou, and Tieyi Yan
Appl. Opt. 53(30) 7045-7049 (2014)