| 基于三芯Bragg光纤光栅的弯曲曲率计算理论 |
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| 引用本文： | 姜海丽,孙伟民,董明伟,李晓林.基于三芯Bragg光纤光栅的弯曲曲率计算理论[J].应用科技,2011,38(6):50-53. |
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| 作者姓名： | 姜海丽 孙伟民 董明伟 李晓林 |
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| 作者单位： | 1. 哈尔滨工程大学理学院,黑龙江,哈尔滨,150001
2. 哈尔滨工程大学信息与通信工程学院,黑龙江,哈尔滨,150001 |
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| 基金项目： | 黑龙江省自然科学基金资助项目(A0308) |
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| 摘 要： | 基于Bragg光纤光栅的中心波长随应变发生偏移的特点,提出利用三芯光纤的Bragg光栅进行三维曲率计算的理论.分析了3个光纤光栅的中心波长随曲率半径、中性面到中心的距离、偏转角之间的变化关系,并且用MATLAB进行数值仿真,结果表明反射波长随曲率半径的增加而减小;位于中性面上方的光栅的中心波长的偏移会随中性面和中心的距离d的增加而增加,位于中性面下方的光栅的中心波长的偏移会减小.
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| 关 键 词： | 三芯光纤 Bragg光纤光栅 曲率半径 中性面 |
The theory of measuring bend-curvature based on three-corefiber Bragg grating |
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| JIANG Haili,SUN Weimin,DONG Mingwei,LI Xiaolin.The theory of measuring bend-curvature based on three-corefiber Bragg grating[J].Applied Science and Technology,2011,38(6):50-53. |
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| Authors: | JIANG Haili SUN Weimin DONG Mingwei LI Xiaolin |
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| Institution: | JIANG Haili1,SUN Weimin1,DONG Mingwei1,LI Xiaolin2 (1.College of Science,Harbin Engineering University,Harbin 150001,China,2.College of Information and Communication Engineering,China) |
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| Abstract: | This paper proposes a theoretical analysis of measuring three-dimensional bend-curvature by using three-corefiber Bragg grating,based on the characteristics of the three-corefiber Bragg grating's central wavelength shifting with strain.The changes of the central wavelength of the three-core-fiber Bragg grating with the radius of curvature,the distance from neutral plane to the center,and the deflection angle were analyzed and simulated by Matlab.The results show that reflected wavelength will decrease with ... |
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| Keywords: | three-core fiber fiber Bragg grating radius of curvature normal neutral plane |
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