本文描述了用受控声束跟踪布喇格角的一种新宽带声光布喇格偏转器。为了取代一般的阶梯阵列声光栅以产生受控声柱,用一压电片焊到声光介质上制成平面换能器光栅,并通过叉指电极结构来形成空间的周期性相位变化。对工作在100兆赫频率以上的偏转器来说,平面阵列因其易于制造而优于阶梯阵列,此优点远足以补偿用于光衍射的声功率的少量减损。分析表明:在最佳设计条件下,控束偏转器所获得的半功率带宽超过具有同样换能器尺寸的固定束偏转器带宽4倍以上,钼酸铅偏转器的实验结果证实了这一点。 This article describes a new wideband acousto-optic Bragg deflector that tracks the Bragg angle with a controlled beam. In order to replace the conventional ladder-type acoustic grating to produce a controlled acoustic column, a piezoelectric transducer is used to weld the acousto-optic medium to make a planar transducer grating, and the periodic phase change of the space is formed by the interdigital electrode structure. For deflectors operating at frequencies above 100 MHz, planar arrays outperform ladder arrays because of their ease of manufacture, an advantage that goes far enough to compensate for small impairments in acoustic power used for light diffraction. The analysis shows that under optimal design conditions, the half-power bandwidth obtained by the controlled-beam deflector is more than four times the bandwidth of a fixed-beam deflector with the same transducer size, as evidenced by experimental results with lead molybdate deflectors.