Detection of weak seismic waves in sea-ground interface by fiber-optic interferometric seismometer

5th International Conference of Photonics and Information Optics

Kamenev, O.T.^1 ; Petrov, Yu S.^1 ; Khiznyak, R.V.^1 ; Romashko, R.V.^1

Institute of Automation and Control Processes, Far Eastern Branch of Russian Academy of Sciences, 5 Radio Street, Vladivostok

690041, Russia^1

关键词: Fiber optical sensing;    High sensitivity;    Long term stability;    Multi-turn;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/737/1/012040/pdf
DOI  :  10.1088/1742-6596/737/1/012040

来源: IOP

【 摘 要 】

The possibility of detection of weak seismic waves in sea-ground interface by fiberoptic interferometric seismometer is experimentally demonstrated. High sensitivity of the seismometer to acceleration 10-7m/s2is provided by application of original multiturn fiber- optical sensing element. Long term stability of the seismometer operation is provided by feedback control of the interferometer working point.