Helical Fiber Interferometer Using Flame-Heated Treatment for Torsion Sensing Application
Helical Fiber Interferometer Using Flame-Heated Treatment for Torsion Sensing Application
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DOI：
10.1109/lpt.2016.2630854
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发表时间：
2017
影响因子：
2.6
通讯作者：
Xin-Yu Li;Weigang Zhang;Lei Chen;Yan-Xin Zhang;Song Wang;Tieyi Yan;Quan Zhou;Biao Wang
中科院分区：
文献类型：
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作者：
Xin-Yu Li;Weigang Zhang;Lei Chen;Yan-Xin Zhang;Song Wang;Tieyi Yan;Quan Zhou;Biao Wang
采用火焰加热法制备了一种用于扭转传感的单模光纤螺旋干涉仪。据我们所知，这是第一次设计这种干涉仪并进行实验验证。通过将线偏振光束入射到SFH中，由于光纤弯曲引起的双折射，在结构的输出端形成了干涉。理论分析表明，当传感器部分受到扭转作用时，几何形状的变化会带来共振的倾角波长漂移。此外，通过调整螺旋线半径和螺距，可以进一步优化扭转灵敏度。实验数据表明，对于半径为0.89 mm、螺距为2.04 mm的超细管，扭转灵敏度在-9.39~13.42rad/m范围内达到1.691 nm·m/rad。
An interferometer using a single-mode fiber helix (SFH) was fabricated by the flame-heated treatment for torsion sensing application. For the first time to the best of our knowledge, this kind of interferometer was designed and experimentally demonstrated. By launching a linear polarized beam into the SFH, the interference was formed at the output of the structure because of the fiber bending-induced birefringence. Theoretical analysis shows that the geometrical change will bring a resonant dip wavelength shift when torsion is applied to the sensor part. Additionally, by adjusting the helix radius and pitch, the torsion sensitivity can be further optimized. From the experiment data, the torsion sensitivity reaches 1.691 nm·m /rad from -9.39 to 13.42 rad/m for the SFH with a radius of 0.89 mm and a pitch of 2.04 mm.