期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 35, 期 5, 页码 269-272出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2023.3239509
关键词
Strain; Sensitivity; Optical fiber sensors; Claddings; Optical fiber theory; Bending; Heating systems; Strain sensor; long-period fiber grating; core micro-bending
In this study, a novel fiber grating sensor based on symmetrical polished fiber plane is designed and experimentally tested. By using CO2-laser polishing and oxyhydrogen flame heating, periodic bending cores are achieved on a symmetrical polished plane, which greatly enhances the sensitivity of the structure. The experimental results demonstrate that the proposed sensor has a high strain sensitivity of -0.846 nm/με and a temperature sensitivity of 236 pm/°C.
In this letter, a novel core-bending long period fiber grating (CB-LPFG) based on symmetrical polished fiber plane is designed and experimentally testified. By employing methods of CO2-laser polishing and oxyhydrogen flame heating, periodic bending cores are achieved on a symmetrical polished plane. Due to the reduction of the cladding and the bent core, the sensitivity of the structure is strongly enhanced. Experimental results present that the highest strain sensitivity of CB-LPFG with 7 periods reaches-0.846 nm/mu epsilon. To the best of our knowledge, is firstly increasing the strain sensitivity of fiber sensor based on single-wavelength demodulation to nm/mu epsilon level. Meanwhile, the temperature sensitivity of CB-LPFG is 236 pm/degrees C with dynamic range of 30-130 degrees C. Consequently, the proposed sensor is expected to offer significant potential to detect micro-deformation more precisely.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据