Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5007306 | Optics & Laser Technology | 2018 | 5 Pages |
Abstract
We present a strain-independent torsion and displacement fiber sensor using acoustically-induced fiber grating (AIFG) in dual-mode fiber (DMF). By tuning the radio frequency of driving signal, LP01 and LP11 modes generated by the AIFG can be exploited to measure the dynamic displacement and torsion variations, respectively. Both the twist angle and the twist direction can be monitored via image detection facility at the end of DMF. Between torsion angles of â80° and 80°, the highest twist sensitivity reaches 15 pixel/°. The average displacement sensitivity is 5 pixel/µm within the recorded two-dimensional movement of 100um Ã 80um. The stable property of sensor is verified when the strain is varied from 100 με to 1500 με.
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Authors
Yu Liu, Guobin Ren, Youchao Jiang, Yuean Mi, Haisu Li, Bofeng Zhu, Yuguang Yang, Ya Shen, Shuisheng Jian,