Ri Chol-Yong, Choe Jin-Hyok, Ri Hwa-Ryong, Pak Chol-Min, Ri Kyong-Rim, O Jin-Myong
Appl Opt. 2021 May 1;60(13):3801-3807. doi: 10.1364/AO.421863.
Laser diode-based self-mixing interferometry (SMI) is a promising technique for noncontact sensing and its industry. In this paper, a phase unwrapping method in the several optical feedback levels is proposed based on displacement direction. A novel, to the best of our knowledge, method for evaluating the optical feedback factor C simultaneously with the linewidth enhancement is proposed by taking into account the effect of the accuracy of the linewidth enhancement $ \alpha $ on the evaluated method for C based on the differential feature of vibration reconstruction signal. Simulations and experiments are conducted to verify the proposed method.
基于激光二极管的自混合干涉测量法（SMI）是一种用于非接触传感及其相关行业的很有前景的技术。本文提出了一种基于位移方向的多光反馈水平下的相位展开方法。据我们所知，通过考虑线宽增强因子α的精度对基于振动重建信号微分特征的C评估方法的影响，提出了一种与线宽增强同时评估光反馈因子C的新方法。进行了仿真和实验以验证所提出的方法。
