Author(s): Li, HC (Li, Huicong); Zhang, WT (Zhang, Wentao); Huang, WZ (Huang, Wenzhu); Du, YL (Du, Yanliang)

Source: CHINESE OPTICS LETTERS Volume: 19 Issue: 5 Article Number: 051201 DOI: 10.3788/COL202119.051201 Published: MAY 10 2021

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 6.74 ng/pHz 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.

Accession Number: WOS:000649411000014

ISSN: 1671-7694

Full Text: https://www.researching.cn/articles/OJ7b28fcaf20fdff2f/html