Laser Doppler velocimetry using a bulk optic Michelson interferometer: A student laboratory experiment
Laser Doppler velocimetry using a bulk optic Michelson interferometer: A student laboratory experiment
复制标题
使用体光学迈克尔逊干涉仪的激光多普勒测速：学生实验室实验
DOI：
--
复制
发表时间：
1993
期刊：
影响因子：
--
通讯作者：
K. Wanser
中科院分区：
文献类型：
--
作者：
Richard Belansky;K. Wanser
使用迈克尔逊干涉仪和低成本频谱分析仪测量移动镜反射光的多普勒频率。多普勒频率的实验数据与计算的理论值一致，标准百分比误差为0.54%。提出了相位调制信号与多普勒信号的光学混合的概念，并使用小相位调制幅度近似推导了所得到的检测到的信号功率。描述了使用激光多普勒测速仪通过声波外差多普勒信号的实验。该实验很好地说明了高级本科实验室中的多普勒效应、光谱分析以及光学混合和干涉测量原理。
The Doppler frequency of reflected light from a moving mirror is measured using a Michelson interferometer and a low cost spectrum analyzer. The experimental data for the Doppler frequency are in agreement with the calculated theoretical values with a standard percent error of 0.54%. The concept of optical mixing of a phase‐modulated signal with the Doppler signal is presented, with a derivation of the resulting detected signal power, using the small phase modulation amplitude approximation. An experiment is described using laser Doppler velocimetry to heterodyne the Doppler signal with an acoustic wave. The experiment provides a good illustration of the Doppler effect, spectral analysis, and principles of optical mixing and interferometry in an advanced undergraduate laboratory.