23 February 2009 Nuclear explosion seismic wave detection based on the fiber Bragg grating geophone
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Fiber Bragg Grating (FBG) is a basic component in optical communications and optical sensing of strain or pressure or temperature. In this paper, a novel geophone based on FBG is designed and used in the system of nuclear explosion seismic wave detection. The detection principle is analyzed and the mechanical model is established. According to the characteristics of the nuclear explosion seismic wave and the demands of the detection system, the parameters of the novel FBG geophone are calculated, and the results show that the sensitivity coefficient is 0.54pm/ms-2 and the work frequency bands are 0~653Hz and 2830~3266Hz. The prototype detection system is devised and tested through the simulation seismic wave. The experiment indicates that, compared with the traditional electronic sensors, the system has higher sensitivity and stability, the start time of the seismic wave arrived the detection position can be surveyed accurately. Combined with the nuclear explosion detecting sub-system based on the radiation, the distance between the bomb location and the detector can be calculated accurately.
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Jianhui Wu, Jianhui Wu, Kuntao Yang, Kuntao Yang, Qiaolian Xiang, Qiaolian Xiang, Nanyang Zhang, Nanyang Zhang, } "Nuclear explosion seismic wave detection based on the fiber Bragg grating geophone", Proc. SPIE 7278, Photonics and Optoelectronics Meetings (POEM) 2008: Fiber Optic Communication and Sensors, 72780V (23 February 2009); doi: 10.1117/12.821604; https://doi.org/10.1117/12.821604

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