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Proceedings Paper

A high sensitive fiber Bragg grating(FBG) geophone detecting system
Author(s): Jin-Yu Wang; Hai-Feng Qi; Guang-Dong Song; Chang Wang; Tong-Yu Liu
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Paper Abstract

A high sensitive fiber Bragg grating (FBG) geophone detecting system based on narrow line width distributed feedback (DFB) laser is realized by using filtering demodulation. Sensitivity of FBG geophone lies on the structure of the sensor shell and the shape of the reflectivity spectrum of FBG. Experiments on the detecting system's frequency character have been done. Results show that this geophone can detect the smallest acceleration of 1mm/s2 with a flat response from 5Hz to 40Hz.. The experiments on coal mine exhibit that the geophone can be used to measure microseismic signals. The detecting system shows great prospect in micro-seismic detection, and geological disasters detecting.

Paper Details

Date Published: 31 January 2012
PDF: 7 pages
Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 83511D (31 January 2012); doi: 10.1117/12.914245
Show Author Affiliations
Jin-Yu Wang, Key Lab. of Optical Fiber Sensoring Technology of Shandong Province (China)
Shandong Academy of Sciences (China)
Hai-Feng Qi, Key Lab. of Optical Fiber Sensoring Technology of Shandong Province (China)
Shandong Academy of Sciences (China)
Guang-Dong Song, Key Lab. of Optical Fiber Sensoring Technology of Shandong Province (China)
Shandong Academy of Sciences (China)
Chang Wang, Key Lab. of Optical Fiber Sensoring Technology of Shandong Province (China)
Shandong Academy of Sciences (China)
Tong-Yu Liu, Key Lab. of Optical Fiber Sensoring Technology of Shandong Province (China)
Shandong Academy of Sciences (China)
Shandong Micro-Sensor Photonics Ltd. (China)


Published in SPIE Proceedings Vol. 8351:
Third Asia Pacific Optical Sensors Conference

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