Abstract

In this paper a novel acousto-electro-optic (AEO) modulator that combined acousto-optic effects and electro-optic effects is presented. Based on the design of Acousto-optic modulator (AOD), electro-optic effects is also utilized by sticking Direct current (DC) electrodes to AOD surface, which direction of the electric field is perpendicular to the acoustic plane and the incident light. The operating mode of the AEO device is systimatically studied for the first time and the optimum operating mode is determined; we designed and made a modulator of centre frequency 60 MHz using LiNbO<sub>3</sub> crystal, which can realize acousto-optic effects and electro-optic effects at the same time. The experiments results show that this novel modulator can not only realize light modulation, but also has a wider 3db bandwidth, which is agreed with the theoretical analysis. This novel modulator has wider applications in optic communication and optic signal processing.

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