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• 地球探测与信息技术 • 上一篇    下一篇

光纤布拉格光栅波长解调系统的研制

孟宪玮,张青,史彦新,韩永温,蒋凡   

  1. 中国地质调查局 水文地质环境地质调查中心,河北 保定 071051
  • 收稿日期:2008-08-04 修回日期:1900-01-01 出版日期:2009-03-26 发布日期:2009-03-26
  • 通讯作者: 孟宪玮

Development of Wavelength Demodulation for Fiber Bragg Grating

MENG Xian-wei, ZHANG Qing, SHI Yan-xin, HAN Yong-wen, JIANG Fan   

  1. Centre for Hydrogeology and Environmental Geology, CGS, Baoding, Hebei 071051, China
  • Received:2008-08-04 Revised:1900-01-01 Online:2009-03-26 Published:2009-03-26
  • Contact: MENG Xian-wei

摘要: 光纤布拉格光栅波长解调系统利用光纤光栅的平均折射率和栅格周期对外界参量的敏感特性,将外界参量的变化转化为其布拉格波长的移动,通过解调布拉格波长的偏移来确定待测物理量的变化。采用波分复用技术构成光纤光栅传感网络,提出了由光源、布拉格光栅传感网络、光栅波长检测电路构成FBG波长解调系统的硬件设计方案。利用LabVIEW丰富的功能函数库,设计光纤布拉格光栅波长解调系统软件的各功能模块。最后在室内进行了FBG波长解调系统的调试实验。结果表明:在相同测试环境下,传感器的测试波长变化较稳定,数据的重复性较好,系统软硬件运行稳定可靠。

关键词: 光纤布拉格光栅, 光纤光栅传感网络, 波长解调, LabVIEW

Abstract: The wavelength demodulation with fiber Bragg grating bases the property that the average refractive index and grid period of fiber grating are sensitive to the environment variation, and the drift of Bragg wavelength depends on the environment parameter change, thus the environment parameter may be demodulated from the drift of Bragg wavelength. The multiplying technology has been used to construct the fiber grating sensing network. With the network, a light source and Bragg wavelength detecting circuit, hardware has been developed. Using LabVIEW, the corresponding software has been designed. Both the hardware and software have been tested in the lab. The experimental results indicate that under the same test conditions the variation of FBG wavelength is stable, the processing data is repetitive, and the system is reliable.

Key words: fiber Bragg grating(FBG), fiber grating sensing network, wavelength demodulation, LabVIEW

中图分类号: 

  • TN911.7
[1] 史彦新,张青,孟宪玮. 分布式光纤传感技术在滑坡监测中的应用[J]. J4, 2008, 38(5): 820-0824.
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