光学
干涉测量
马赫-曾德尔干涉仪
扭转(腹足类)
光纤
材料科学
光纤传感器
物理
医学
外科
作者
Qinjiang Fu,Jingdong Zhang,Chuancan Liang,Iroegbu Paul Ikechukwu,Guolu Yin,Lei Lu,Yitian Shao,Liu Liu,Dongxiao Liu,Tao Zhu
出处
期刊:Optics Letters
[The Optical Society]
日期:2018-05-14
卷期号:43 (10): 2414-2414
被引量:45
摘要
In this Letter, we demonstrated an intensity-modulated directional torsion sensor based on an in-line Mach-Zehnder interferometer in single-mode fiber. A non-circular symmetric perturbation is created to excite non-circular symmetric cladding mode and then interference with the core mode at the second perturbation. An initial rotation angle is designed between two perturbations for the purpose of discriminating the torsion direction. Both experimental and theoretical results enforce that the spectral peak/dip turns to be the dip/peak when the fiber is twisted from the counter-clockwise to the clockwise direction. Benefiting from the reversal between peak and dip, an intensity-modulated directional torsion sensor is realized in the range from -50 rad/m to 50 rad/m with a sensitivity of 45.3%/(rad/cm).
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