Details

Autor(en) / Beteiligte

• Wei, Yong
• Wang, Xingkai
• Jiang, Tianci
• Liu, Chunlan
• Liu, Chunbiao
• Shi, Chen
• Yang, Minghui
• Chen, Liping
• Wang, Rui
• Liu, Zhihai

Titel

High Sensitivity Interference Torsion Sensor Based on Dumbbell Fiber

Ist Teil von

• IEEE sensors journal, 2023-10, Vol.23 (20), p.24552-24557

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2023

Quelle

IEEE Explore

Beschreibungen/Notizen

• In the field of engineering testing, fiber interferometric torsion sensor is used to measure the magnitude of torsion, and their sensitivity needs to be further improved and identify the direction of torsion. To improve the internal stress distribution when the fiber is twisted and increase the modulation of the twist on the refractive index of the fiber core, we designed and manufactured a dumbbell-shaped end structure fiber and constructed an interference torsion sensor with a structure of single-mode fiber dumbbell fiber single-mode fiber. The experimental results indicate that its torsional sensing sensitivity is 0.65 nm/(rad/m). When pretwisted to a pitch of <inline-formula> <tex-math notation="LaTeX">450 ~\mu \text{m} </tex-math></inline-formula> on the dumbbell fiber, it has sensitivities of 2.13 and −1.57 nm/(rad/m) in both forward and reverse torsion directions, respectively. Meanwhile, the sensor can measure physical quantities such as refractive index, temperature, and strain, with sensitivities of 237 nm/RIU, −27 pm/°C, and −10 pm/<inline-formula> <tex-math notation="LaTeX">\mu \varepsilon </tex-math></inline-formula>, and has the advantage of resisting temperature crosstalk. The interference torsion sensor based on dumbbell fiber will play an important role in engineering monitoring.