多束超声波的声光效应探究  

Investigation on the Acousto-optic Effect of Multiple Ultrasonic Beams

作　　者：田堂胜 姚依森 史卓[1] 严一民[1] 

机构地区：[1]电子科技大学物理电子学院,四川成都610054

出　　处：《压电与声光》2014年第4期519-522,共4页Piezoelectrics & Acoustooptics

基　　金：全国高校创新创业基金资助项目

摘　　要：单束激光照射由单个超声波源作用下的声光介质产生布喇格衍射现象。现考虑由多束超声波作用下的声光效应现象,并着重探究多束超声波作用下波源信号变化对声光效应产生的影响。利用麦克斯韦方程推导出声波产生的应力与介质折射率之间的关系,然后用MATLAB进行应力分布和光路仿真验证。结果表明,利用这种方法得出的声光介质具有光晶体的性质。Single beam laser irradiation by acousto-optic medium under the effect of a single ultrasound source causes the Bragg diffraction phenomenon. Considering of acousto-optic effect under multiple ultrasonic beams, the investigation was focused on the influence to acousto-optic effect with the changing of source signal under multiple ultrasonic beams. The relationship between stress caused by ultrasonic waves and refractivity of medium was derived by Maxwell equations. The stress distribution and the light path simulation were proved by MATLAB. Result showed this acousto-optic medium had the characteristics of optic crystal.

关 键 词：多波束 超声波 激光 声光效应 衍射 折射率 仿真 

分 类 号：O426.3[理学—声学] TN65[理学—物理]