Long period fiber grating based on periodically screw-type distortions for torsion sensing
A novel long-period fiber grating (LPFG), fabricated by periodically cascading a series of screw-type distortions, is proposed and experimentally demonstrated. These screw-type distortions are induced by twisting the fiber during CO laser beam exposure. The resulting LPFG will either be left- or rig...
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| Veröffentlicht in: | Optics express 2017-06, Vol.25 (13), p.14308-14316 |
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| container_issue | 13 |
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| container_title | Optics express |
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| creator | Deng, Mi Xu, Jinshan Zhang, Zhe Bai, Zhiyong Liu, Shen Wang, Ying Zhang, Yan Liao, Changrui Jin, Wei Peng, Gangding Wang, Yiping |
| description | A novel long-period fiber grating (LPFG), fabricated by periodically cascading a series of screw-type distortions, is proposed and experimentally demonstrated. These screw-type distortions are induced by twisting the fiber during CO
laser beam exposure. The resulting LPFG will either be left- or right-hand helical, depending on the twist rate and direction used during fabrication, with a certain frozen shear strain. Due to the independence between grating pitch and twist rate, this type of LPFG could be more flexible than the helical- or chiral-fiber gratings reported previously. During LPFG twisting, the device displays good directional dependence and an enhanced torsion sensitivity of 0.1604 nm/(rad/m), which implies the structure could be an excellent candidate for torsion sensors. |
| doi_str_mv | 10.1364/oe.25.014308 |
| format | Article |
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| title | Long period fiber grating based on periodically screw-type distortions for torsion sensing |
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