摘要
基于斐索干涉原理建立了可用于nm量级微位移测量的光纤式斐索干涉仪，并将其应用于激光激发超声表面波的非接触光学探测。在实验上，测量了脉冲激光在铝块表面上激发的超声表面波波形，根据波形算得瑞利波在铝中的传播速度为2．97×10^3m/s，与理论值2．93×10^3m／s相比，偏差小于2％。实验结果表明光纤式斐索干涉仪是非接触探测激光超声表面波的一种有效途径。
Based on the Fizeau interferometer principle, a nanometer displacement meter is developed to detect the surface acoustic wave induced by pulsed Nd： YAG laser. In the experiment, Rayleigh wave on the surface of aluminum has been detected, which is induced by a pulsed Nd： YAG laser with pulse width 10ns. According to the wave-form, the velocity of Rayleigh wave is 2.97×10^3m/s can be obtained. Compared with theoretical value 2.93×10^3 m/s, the relative deviation is less than 2%.
出处
《实验技术与管理》
CAS
2008年第11期63-66,共4页
Experimental Technology and Management
基金
南京理工大学综合性、设计性及研究创新性实验建设项目
关键词
光纤斐索干涉仪
激光超声波
表面波
fiber Fizeau interferometer
laser ultrasonic wave
surface acoustic wave
