Abstract
Abstract Acousto-optic (AO) effect is an important factor affecting the transmission performance of optical fiber. Here, a metamaterial-based sensing scheme is proposed and applied to measure the AO effect resonance behaviors inside optical fibers due to sound wave transmission. This sensor scheme can obtain the effect of the amplitude and frequency of the sound wave on the optical fiber at the same time, which is different from the traditional photoelectric measurement scheme. The physical mechanism of the AO effect is revealed by measuring the amplitude and frequency of sound waves. The AO effect in the fiber is enhanced with the drive voltage of the sound wave generator increasing, which leads to the transmission performance of the fiber be suppressed. On the contrary, the attenuation coefficient and the group velocity of the fiber are basically stable. At the same time, the time for sound waves to enter and leave the AO effect zone is extended. Moreover, the AO effect is enhanced as the sound frequency gradually approached the resonant frequency. These measurements reveal the physical mechanism of the AO effect of optical fibers and validate the feasibility of this proposed metamaterial sensing scheme.
Published Version
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