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EXPERIMENTAL STUDY OF HIGH RESOLUTION DIGITAL SEISMOGRAPH

LU QI-HU; CHEN SHAO-GUANG; LIU BAO-CHENG; LIU REN; CHEN FU(Institute of Geophysics,State Seismological Bureau,Beijing 100081.China)(Science Academy Jiangxi Province,Nanchang 330029,China)(Department of Geophysics,Peking University,Beijing 100871,China)(I  
In order to raise the resolution and dynamic range of digital seismograph, this paper gave a brief introduction of a kind of new idea about frequency-shifted laser technology and its fundamental principle on designing seismograph.Also,it described the preliminary experimental results produced by using above-mentioned principle.A best accuracy and higher resolution could be obtained by the seismograph made based on this principle and the dynamic range could be enhanced to 160 dB.
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