This paper describes time-dependent phase modulation experiments using an optical Michelson interferometer. Changes in the path length of the interferometer arms induce phase shifts in time and, thanks to a loudspeaker, make the interferometric signal audible. We produce time-fluctuating refractive indices and mechanical motions of one reflecting mirror. A sinusoidal motion is applied, thus creating a phase modulation of the wave in one of the interferometer arms. Sidebands of the laser frequency appear, which interfere with the other interferometer wave. Our hearing sense is quite developed, and we use it to analyze the non-linear character by the acoustic timbre. Finally, we transfer information by phase modulation. Our setup benefits the visually impaired community as temporal phase changes can be analyzed by the auditory sense, but this unconventional use of an optical interferometer is also attractive to a general audience.

中文翻译：

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迈克尔逊干涉仪中光波的响亮节拍

本文描述了使用光学迈克尔逊干涉仪的瞬态相位调制实验。干涉仪臂路径长度的变化会引起时间上的相移，并且由于扬声器，使干涉测量信号可听。我们产生一个反射镜的随时间波动的折射率和机械运动。施加正弦运动，从而在干涉仪臂之一中产生波的相位调制。出现激光频率的边带，它会干扰另一个干涉仪波。我们的听觉相当发达，我们用它来分析声学音色的非线性特征。最后，我们通过相位调制传输信息。我们的设置使视障社区受益，因为可以通过听觉分析时间相位变化，