Performance comparison of fiber laser geophones and moving-coil geophones

Xuebing Wu; Faxiang Zhang; Xiaolei Zhang; Shujuan Li

doi:10.1117/12.2073203

3 December 2014 Performance comparison of fiber laser geophones and moving-coil geophones

Xuebing Wu, Faxiang Zhang, Xiaolei Zhang, Shujuan Li

Proceedings Volume 9297, International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors; 929736 (2014) https://doi.org/10.1117/12.2073203
Event: International Symposium on Optoelectronic Technology and Application 2014, 2014, Beijing, China

Abstract

This paper reports laboratory comparison of fiber laser geophones and moving-coil geophones. A fiber laser geophone and a 20 DX geophone geophone were tested. The fiber laser geophone is based on a L shape beam structure and demodulated with an interferometric method. The signal of the moving-coil geophone is measured by a 24-Bit DAQ. Typical features of geophones include sensitivity, frequency response, spurious frequency, dynamic range, damp and noise character were compared. The results show that the fiber laser geophone has comparable performances with moving-coil geophone, and exhibits very high sensitivity and better high-frequency signal to noise ratio than moving-coil geophone. The fiber laser geophone is expect to be applied in micro-seismic monitoring of unconventional oil and gas hydraulic fracturing.

Citation Download Citation

Xuebing Wu, Faxiang Zhang, Xiaolei Zhang, and Shujuan Li "Performance comparison of fiber laser geophones and moving-coil geophones", Proc. SPIE 9297, International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors, 929736 (3 December 2014); https://doi.org/10.1117/12.2073203

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