Fiber optic accelerometers and seismometers

This paper presents performance and figures‐of‐merit of fiber optic interferometric accelerometers and seismometers using flexural disk, mandrel, and fluid filled transducers. Flexural disk devices having sensitivities of 50 radians/g and operating bandwidths to 2 kHz have been reported. This sensitivity corresponds to a minimum detectable signal of 20 nano‐g/√Hz for a system demodulation noise floor of 1 micro‐radian/√Hz.