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Fiber Optic Seismic Monitoring System for Highway Rock Slope

Seismic monitoring is essential for the stability assessment of highway rock slope. This paper presents the design and implementation of a precision fiber optic seismic monitoring system for highway rock slope using fiber Bragg grating geophone and vertical-cavity surface-emitting laser-based interrogator. The overall composition, sensor design and interrogation scheme are introduced in detail. The field test results show that this system has great potential for stability monitoring of highway rock slope.