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.
出处
《压电与声光》
CSCD
北大核心
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
关键词
多波束
超声波
激光
声光效应
衍射
折射率
仿真
multiple-beam
ultrasonic waves
laser
photoacoustic effect
diffraction
refractivity
simulation
