Abstract

We propose what we believe to be a novel long-period fiber grating (LPFG) based on a polarization-maintaining fiber (PMF) and single-mode fiber. Due to the principal axis of stress, the resonance peak is strongly dependent on the polarization state of the input light. Under different polarization states, the response of the resonance peak to the change of the external environment is different. A single resonance peak can measure several physical quantities without wavelength overlap using polarization multiplexing. The experimental results show that the PMF-LPFG realizes a high sensitivity torsion and bending measurement under different polarization states (−3.27 nm/rad*m and −13.38 nm/m) and can also measure the ambient temperature (84.10 pm/°C). The PMF-LPFG unit has the advantages of small size, high sensitivity, and multi-parameter measurement. The design scheme of the sensor provides a new idea for a multi-parameter sensor.

© 2022 Optica Publishing Group

High-sensitivity strain sensor based on a helical-core long-period fiber grating

Yiwei Ma, Jing Sun, Min Zhang, Min Zhao, Chunbo Su, Xudong Chen, Zhihai Liu, Tao Geng, Weimin Sun, and Libo Yuan
Opt. Lett. 47(15) 3748-3751 (2022)

Concave-lens-like long-period fiber grating bidirectional high-sensitivity bending sensor

Yun-Shan Zhang, Wei-Gang Zhang, Lei Chen, Yan-Xin Zhang, Song Wang, Lin Yu, Yan-Ping Li, Peng-Cheng Geng, Tie-Yi Yan, Xin-Yu Li, and Ling-Xin Kong
Opt. Lett. 42(19) 3892-3895 (2017)

All fiber compact bending sensor with high sensitivity based on a multimode fiber embedded chirped long-period grating

Shuo Zhang, Tao Geng, Huiwen Niu, Xiang Li, Yunxiang Yan, Cuiting Sun, Sifan Deng, Zemin Wang, Shengjia Wang, Wenlei Yang, Weimin Sun, and Libo Yuan
Opt. Lett. 45(15) 4172-4175 (2020)

Dual-parameter demodulated torsion sensor based on the Lyot filter with a twisted polarization-maintaining fiber

Yichao Zheng, Jinjian Li, Yi Liu, Yan Li, and Shiliang Qu
Opt. Express 30(2) 2288-2298 (2022)

Two-dimensional microbend sensor based on long-period fiber gratings in an isosceles triangle arrangement three-core fiber

Song Wang, Weigang Zhang, Lei Chen, Yanxin Zhang, Pengcheng Geng, Yunshan Zhang, Tieyi Yan, Lin Yu, Wei Hu, and Yanping Li
Opt. Lett. 42(23) 4938-4941 (2017)