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. Author manuscript; available in PMC: 2020 Jan 1.
Published in final edited form as: J Vib Acoust. 2019;141:10.1115/1.4042929. doi: 10.1115/1.4042929

Fig. 3.

Fig. 3

Experimental characterization of UV-molded graphene-based fiber optic sensors: (a) experimental setup with a low-coherence fiber optic interferometric system, (b) reflectivity of the Fabry–Perot interferometer of the sensor head, (c) frequency response of sensors with two different kinds of diaphragms (dots for experiments and lines for simulation), (d ) time domain signals at 2 kHz from the reference microphone (top), fiber optic sensor with graphene only as the diaphragm (middle), and sensor with graphene and silver composite diaphragm (bottom), all of which are normalized to have an amplitude of 1, and (e) Fourier transform of the signals in (d )