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声光器件在设计和制作中 ,由于器件结构和功能上的需要 ,常采用级联形式的声光互作用。根据声光互作用的一般理论 ,对不同的声光互作用条件下 ,级联布喇格声光互作用的频移和光束偏转进行了分析。当组合两次不同的声光互作用 ,可以得到不同的频移和光束偏转。并指出 ,通过调节两声波的频率 ,可以使输出光波的传播方向不随声波频率的改变而变化
Acousto-optic devices in the design and production, due to the device structure and functional needs, often in the form of a cascade of acousto-optic interaction. According to the general theory of acousto-optic interaction, the frequency shift and beam deflection of cascaded Bragg acousto-optic interaction under different acousto-optic interaction are analyzed. When combining two different acousto-optic interactions, different frequency shifts and beam deflections can be obtained. And pointed out that by adjusting the frequency of the two sound waves, you can make the output light wave propagation direction does not change with the sound frequency changes