反常大带宽声光偏转器

Abnormal Acousto-optic Deflector With Large-bandwidth

该文介绍了一种利用反常声光互作用原理制作的大带宽声光偏转器。该器件使用的声光互作用介质是磷化镓晶体,声波模式是横波,采用单片换能器结构,实现了带宽与衍射效率的合理兼顾。制作的大带宽声光偏转器样品的3dB带宽达1 040MHz,峰值衍射效率达20.4%@1W,这时中心频率为1.62GHz,光波长是633nm。

This article introduces a kind of large-bandwidth acousto-optic deflector using the principle of abnormal acousto-optic interaction. This devise uses GaP crystal as the acousto-optic interacting medium and shear wave as the acoustic wave mode. Considering the trade-off between the bandwidth and the diffraction efficiency, it uses the structure of single chip transducer. The prepared sample of the large-bandwidth acousto-optic deflector has a 3 dB bandwidth of 1 040 MHz and a peak diffraction efficiency of 20.4%@1 W at the center frequency of 1.62 GHz and light wavelength of 633 nm.