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In this paper we report the development and field test analysis of a high sensitivity fiber laser geophone array. The fiber laser geophone array, as well as a moving-coil geophone array for comparison purpose, is field tested using the downhole explosion method at different points of the array at Shengli oilfield, Shandong, China. The detailed information of the acquired seismic signals, e.g. waveform,...
In order to detect the weak underwater acoustic signal, a Distributed Acoustic Sensing (DAS) scheme based on the self-interference of Rayleigh backscattering is presented. Rayleigh backscattered light which contains a phase change induced by acoustic signal along the sensing fiber which is a standard telecom single-mode fiber is split and fed into an imbalance Michelson interferometer. With the self-interference...
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