Highly Sensitive Two-Axis Bending Sensor Based on Arc-Induced Long Period Fiber Grating in Dual Side-Hole Fiber
A highly sensitive two-axis bending sensor based on long period fiber grating (LPFG) in a dual side-hole fiber (DSHF) is presented and experimentally investigated. The LPFG is fabricated by periodically collapsing a piece of DSHF with automatic arc discharge technology. The existence of the two air...
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IEEE
2018-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8171724/ |
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| author | Yang Ouyang Huiyong Guo Xiaowei Ouyang Xiaofeng Xu Ciming Zhou Ai Zhou |
| author_facet | Yang Ouyang Huiyong Guo Xiaowei Ouyang Xiaofeng Xu Ciming Zhou Ai Zhou |
| author_sort | Yang Ouyang |
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| description | A highly sensitive two-axis bending sensor based on long period fiber grating (LPFG) in a dual side-hole fiber (DSHF) is presented and experimentally investigated. The LPFG is fabricated by periodically collapsing a piece of DSHF with automatic arc discharge technology. The existence of the two air holes in the DSHF makes the cladding modes, regardless of the polarization state, concentrate in the area perpendicular to the connection of the two holes. Such a feature leads to quite different bending responses at the directions perpendicular and parallel to the connection of the air holes, which makes the DSHF-based LPFG suitable for two-axis bending measurement. The bending sensitivity of the LPFG are 21.03 nm/m<sup>−1</sup> and 15.77 dB/m<sup>−1</sup> at the orthogonal directions, respectively. Besides, compared with the general arc-induced LPFGs in solid fibers, the size of the DSHF-based LPFG is effectively reduced because the periodic air hole collapse in the DSHF causes a large geometric deformation of the fiber core and increases coupling coefficient between the core and cladding modes. The sensing characteristics of strain, polarization, surrounding refractive index, and temperature are also investigated in our experiment. |
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| issn | 1943-0655 |
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| publishDate | 2018-01-01 |
| publisher | IEEE |
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| series | IEEE Photonics Journal |
| spelling | doaj-art-2e5e7f61ea8c4e9c941f92150a543d3a2025-07-01T23:35:18ZengIEEEIEEE Photonics Journal1943-06552018-01-011011910.1109/JPHOT.2017.27817338171724Highly Sensitive Two-Axis Bending Sensor Based on Arc-Induced Long Period Fiber Grating in Dual Side-Hole FiberYang Ouyang0https://orcid.org/0000-0002-4805-1451Huiyong Guo1https://orcid.org/0000-0003-3102-1237Xiaowei Ouyang2Xiaofeng Xu3Ciming Zhou4https://orcid.org/0000-0002-8863-7334Ai Zhou5https://orcid.org/0000-0002-4305-8822National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan, ChinaNational Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan, ChinaNational Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan, ChinaKey Laboratory of Fiber Optic Sensing Technology and Information Processing, Wuhan University of Technology, Ministry of Education, Wuhan, ChinaKey Laboratory of Fiber Optic Sensing Technology and Information Processing, Wuhan University of Technology, Ministry of Education, Wuhan, ChinaKey Laboratory of Fiber Optic Sensing Technology and Information Processing, Wuhan University of Technology, Ministry of Education, Wuhan, ChinaA highly sensitive two-axis bending sensor based on long period fiber grating (LPFG) in a dual side-hole fiber (DSHF) is presented and experimentally investigated. The LPFG is fabricated by periodically collapsing a piece of DSHF with automatic arc discharge technology. The existence of the two air holes in the DSHF makes the cladding modes, regardless of the polarization state, concentrate in the area perpendicular to the connection of the two holes. Such a feature leads to quite different bending responses at the directions perpendicular and parallel to the connection of the air holes, which makes the DSHF-based LPFG suitable for two-axis bending measurement. The bending sensitivity of the LPFG are 21.03 nm/m<sup>−1</sup> and 15.77 dB/m<sup>−1</sup> at the orthogonal directions, respectively. Besides, compared with the general arc-induced LPFGs in solid fibers, the size of the DSHF-based LPFG is effectively reduced because the periodic air hole collapse in the DSHF causes a large geometric deformation of the fiber core and increases coupling coefficient between the core and cladding modes. The sensing characteristics of strain, polarization, surrounding refractive index, and temperature are also investigated in our experiment.https://ieeexplore.ieee.org/document/8171724/Two-axis bendingdual side holelong period fiber gratingarc discharge technology. |
| spellingShingle | Yang Ouyang Huiyong Guo Xiaowei Ouyang Xiaofeng Xu Ciming Zhou Ai Zhou Highly Sensitive Two-Axis Bending Sensor Based on Arc-Induced Long Period Fiber Grating in Dual Side-Hole Fiber IEEE Photonics Journal Two-axis bending dual side hole long period fiber grating arc discharge technology. |
| title | Highly Sensitive Two-Axis Bending Sensor Based on Arc-Induced Long Period Fiber Grating in Dual Side-Hole Fiber |
| title_full | Highly Sensitive Two-Axis Bending Sensor Based on Arc-Induced Long Period Fiber Grating in Dual Side-Hole Fiber |
| title_fullStr | Highly Sensitive Two-Axis Bending Sensor Based on Arc-Induced Long Period Fiber Grating in Dual Side-Hole Fiber |
| title_full_unstemmed | Highly Sensitive Two-Axis Bending Sensor Based on Arc-Induced Long Period Fiber Grating in Dual Side-Hole Fiber |
| title_short | Highly Sensitive Two-Axis Bending Sensor Based on Arc-Induced Long Period Fiber Grating in Dual Side-Hole Fiber |
| title_sort | highly sensitive two axis bending sensor based on arc induced long period fiber grating in dual side hole fiber |
| topic | Two-axis bending dual side hole long period fiber grating arc discharge technology. |
| url | https://ieeexplore.ieee.org/document/8171724/ |
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