Abstract:We present the concept of an all-optical seismometer based on the principle of optical whispering gallery modes (WGMs). The proposed sensor is compact, rugged, low power, and resistant to electromagnetic interference. A cantilever configuration of a fiber-pigtailed photonic integrated circuit with a ring resonator is employed as the sensing element. The measurement approach is based on the optical excitation of the WGMs of a ring resonator using a 1313 nm tunable diode laser. A digital signal processing system… Show more
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