A basic Michelson laser interferometer for the undergraduate teaching laboratory demonstrating picometer sensitivity
A basic Michelson laser interferometer for the undergraduate teaching laboratory demonstrating picometer sensitivity
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用于本科生教学实验室的基本迈克尔逊激光干涉仪，展示皮米灵敏度
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
E. Black
中科院分区：
文献类型：
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作者：
K. Libbrecht;E. Black
我们描述了一个基本的迈克尔逊激光干涉仪实验的本科教学实验室，实现皮米的灵敏度在一个动手，桌面仪器。除了介绍干涉仪物理和光学硬件外，该实验还侧重于精密测量技术，包括伺服控制，信号调制，相敏检测和不同类型的信号平均。学生们通过一系列步骤来研究这些技术，从使用直接条纹计数的微米级灵敏度到使用调制信号和相敏信号平均的皮米灵敏度。在学生组装，对准和表征干涉仪后，他们然后用它来测量简谐振荡器系统的纳米级运动，作为激光干涉测量如何用作实验科学中的有效工具的实质性例子。
We describe a basic Michelson laser interferometer experiment for the undergraduate teaching laboratory that achieves picometer sensitivity in a hands-on, table-top instrument. In addition to providing an introduction to interferometer physics and optical hardware, the experiment also focuses on precision measurement techniques including servo control, signal modulation, phase-sensitive detection, and different types of signal averaging. Students examine these techniques in a series of steps that take them from micron-scale sensitivity using direct fringe counting to picometer sensitivity using a modulated signal and phase-sensitive signal averaging. After students assemble, align, and characterize the interferometer, they then use it to measure nanoscale motions of a simple harmonic oscillator system as a substantive example of how laser interferometry can be used as an effective tool in experimental science.