从理论上对“驻波声光调制器”的调制特性进行了分析,提出了从器件的设计、加工上保证在器件的声光互作用介质内形成强的驻波声场,和增加声光互作用介质的长度,以及改进匹配网络等方法。保证器件具有较高的调制效率,从而获得了注入1W的声功率,对He-Ne激光束零级光的调制效率达50%的调制器件。

In this paper, the modulation characteristics of a reflective type standing wave acousto optic modulator are analysed theoretically. In order to ensure forming of a strong standing wave ultrosonic field in the acousto optic interaction substance and the higher modulation efficiency of devices by increasing the length of the acousto optic interaction substance and improving the matching network and so on, some methods regarding the design and manufacture of the modulator are proposed. Thereby, a modulation efficiency of 50% for the zero order light of a He-Ne laser under the injecting power of 1 W is obtained.