ABSTRACT Laser self-mixing interferometry (SMI) is a well-known measurement technique having been applied to the fields of geometrical quantities detection, medical treatment and industry manufacturing. Its detection sensitivity can be improved by frequency shifting towards the laser's relaxation oscillation frequency (ROF), which has always been implemented by a pair of acousto-optic modulators (AOM). This manuscript presents a novel method based on Doppler effect for frequency shifting, which is based on a rotating disk and has the advantages of convenient adjustment and low cost. The theoretical analysis in the form of Doppler shift and time-delayed rate equations is followed, and simulative and experimental results are included to prove its validity. To our knowledge, this technique has not been used in practice till now, and the proposed structure, with these advantages, can find significant applications in designing high performance SMI sensors, and can extend SMI measurement to more kinds of non-cooperative surfaces.

中文翻译：

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用于增强检测灵敏度的多普勒频移激光自混合干涉测量法

摘要 激光自混合干涉测量（SMI）是一种众所周知的测量技术，已应用于几何量检测、医疗和工业制造等领域。它的检测灵敏度可以通过向激光器的弛豫振荡频率 (ROF) 进行频移来提高，这一直是由一对声光调制器 (AOM) 实现的。该手稿提出了一种基于多普勒效应的频移新方法，该方法基于旋转圆盘，具有调整方便、成本低的优点。遵循多普勒频移和时滞速率方程形式的理论分析，并包括仿真和实验结果来证明其有效性。据我们所知，这种技术直到现在还没有在实践中使用，