级联布喇格声光互作用的频移与光束偏转分析

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。

Analyses of the frequency-shifting and beam deflection of the Bragg acoustooptic interaction in cascade

The cascaded acoustooptic interaction is usually used for the need of the devices'structure and function when the acoustooptic devices are designed and fabricated. The frequency shifting and beam deflection of the Bragg acoustooptic interaction in cascade is analyzed according to general Bragg acoustooptic interaction theory. Different frequency shifting and beam deflection can be obtained when the different cascaded acoustooptic interaction scheme is used. An important conclusion is presented that the doubly and frequency-shifted diffracted light propagates in a fixed direction irrespective of magnitude of frequency shift if the two acoustic wave frequency is changed rationally.