Chinese Optics Letters, 2021, 19 (5): 051201, Published Online: Mar. 17, 2021
Design of low frequency fiber optic Fabry–Perot seismometer based on transfer function analysis Download: 506次
Abstract
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 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.
Huicong Li, Wentao Zhang, Wenzhu Huang, Yanliang Du. Design of low frequency fiber optic Fabry–Perot seismometer based on transfer function analysis[J]. Chinese Optics Letters, 2021, 19(5): 051201.