Applications of Fiber Optics Sensors in Seismology

In this paper we present the FBG based high resolution fiber optic sensors and their applications in seismology. Three types of sensors are demonstrated, fiber optic seismometer, fiber optic strain meter and fiber optic temperature sensor. The sensors are based on fiber Bragg grating resonators and swept optical suppressed carrier single sideband (SSB-SC) modulation technique. Field tests show that the proposed sensors have good performance. The earth tide, earthquake events and the temperature fluctuation in the seismic monitoring station are recorded.