Design of low frequency fiber optic Fabry–Perot seismometer based on transfer function analysis  

作　　者：Huicong Li Wentao Zhang Wenzhu Huang Yanliang Du 李慧聪;张文涛;黄稳柱;杜彦良(Optoelectronic System Laboratory,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China;College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China;College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China)

机构地区：[1]Optoelectronic System Laboratory,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China [2]College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China [3]College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China

出　　处：《Chinese Optics Letters》2021年第5期31-36,共6页中国光学快报（英文版）

基　　金：the National Key R&D Program of China(No.2019YFC1509500);Shenzhen Science and Technology Program(No.KQTD20180412181337494);National Natural Science Foundation of China(NSFC)(No.U1939207);Scientific Instrument Developing Project of the Chinese Academy ofSciences,Youth Innovation Promotion Association of CAS(No.2016106);Strategic Priority Research Program A of the Chinese Academy ofSciences(No.XDA22010201)。

摘　　要：We develop a low frequency fiber Fabry–Perot(F-P)seismometer based on transfer function analysis.The seismometer structure and demodulation system accuracy are limitations of low frequency seismic monitoring.The transfer function of the F-P seismometer is analyzed,and the mass displacement spectrum(MDS)is introduced.MDS provides guidance for mechanical structure design and optical interferometer analysis to achieve low noise.The F-P seismometer prototype is built.The experiment shows that the prototype has an average noise of 6.74 ng=p Hz below 50 Hz,and its noise is less than that of the global new high noise model within 0.16–50 Hz,whose potential is considerable.

关 键 词：fiber optics SEISMOMETERS FREQUENCY 

分 类 号：P315.62[天文地球—地震学]