扫描激光探针检测声脉压线声场

DETECTION OF SAW FIELD OF PULSE COMPRESSOR BY LASER SCANNING PROBE

摘要: 本文讨论了晶体表面存在金属线条时的声光相互作用理论,改进了原来的激光探针测量系统,新的系统能够对弱表面波声场进行成像,实验上,还对制作在YZ-LiNbO₃晶体上的声表面波脉压线声场进行了测试,并对结果进行分析和讨论。

Abstract: In this article,the theory of acousto-optical interaction with metal strips on the crystal surface is presented.The original optical probe system is improved.The weak SAW field can be maped by new system.In the experiments,we have detected the distribution of SAW field in the SAW compressor deposited on the surface of YZ-LiNbO₃,and the results are analysed and discussed.