声光频谱分析器的衍射理论解析  

Analysis of Acoustic-optical Spectrum Processor by Wave-optics and Diffraction Theory

作　　者：周涛[1] 陈吉欣[1] 黄禾[1] 周洋舟[2] 

机构地区：[1]信息综合控制国家重点实验室,成都610036 [2]四川压电与声光技术研究所,重庆400060

出　　处：《半导体光电》2010年第4期608-611,共4页Semiconductor Optoelectronics

摘　　要：用波动光学方法和衍射原理对声光频谱分析器的工作原理进行了理论建模,阐明了声光相互作用的本质是声场对光场的动态调制与波前改变的过程。在此基础上,分析了声光频谱分析器中信号的幅频相特征在微波-声波-光波间的传递关系,并将该理论用于解释声光频谱分析器为何不能获得信号相位和复功率谱的原因,最后还给出了提取信号相位的方法。The operating principles of acoustic-optical spectrum processor are described by wave-optics and diffraction theory.The theory can finely explain the acoustic-optic interactivity which is a process that acoustic-wave dynamically modulates optic-wave and changes its wavefrond.Therefore,a transfer function of signal characters between the microwave,acoustic-wave and optic-wave was obtained and used to explain why the acoustic-optical spectrum processor can not get the signal phase and complex spectrum.Finally,a method for obtaining the signal phase is pointed out.

关 键 词：声光 光学衍射 信号处理 

分 类 号：TN248.3[电子电信—物理电子学]