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(a) Normalized frequency response of the MMO for an ensemble of control gains. Black (dashed): the response of the cantilever in absence of control. (b) Effect of the differential gain on the normalized transfer function of the cantilever. (c) Dependence of the frequency shift sweeping the static voltage between the oscillator and the optical fiber. The frequency shift obtained applying a static field is two orders of magnitude lower than the one obtained with the PID control.
