Chinese Optics Letters, 2021, 19 (4): 041202, Published Online: Feb. 4, 2021   

Highly sensitive torsion sensor based on triangular-prism-shaped long-period fiber gratings Download: 661次

Author Affiliations
1 College of Science, Harbin Engineering University, Harbin 150001, China
2 Photonics Research Center, Guilin University of Electronics Technology, Guilin 541004, China
Abstract
We propose and investigate a compact optical fiber sensor that aims to measure the torsion in both amount and direction with high sensitivity. This sensor is configured by a triangular-prism-shaped long-period fiber grating, which is fabricated by the high frequency CO2 laser polished method. The unique design of the triangular-shaped structure breaks the rotational symmetry of the optical fiber and provides high sensitivity for torsion measurement. In preliminary experiments, the torsion response of the sensor achieves a good stability and linearity. The torsion sensitivity is 0.54 nm/(rad/m), which renders the proposed structure a highly sensitive torsion sensor.

Senyu Wang, Yiwei Ma, Xiaoyang Li, Yang Yi, Cuiting Sun, Jingyu Lin, Chengguo Tong, Yuxiang Li, Tao Geng, Weimin Sun, Libo Yuan. Highly sensitive torsion sensor based on triangular-prism-shaped long-period fiber gratings[J]. Chinese Optics Letters, 2021, 19(4): 041202.

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