Joint estimation of self-mixing interferometry parameters and displacement reconstruction based on local normalization

Kim Jin-Hyok; Kim Chol-Hyon; Yun Tu-Hon; Hong Hui-Sung; Ho Kwang-Myong; Kim Kwang-Ho

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Joint estimation of self-mixing interferometry parameters and displacement reconstruction based on local normalization

机译：基于局部归一化的自混合干涉测量参数和位移重建的联合估计

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It is not easy to estimate self-mixing interferometry parameters, namely, the optical feedback factor and the linewidth enhancement factor from the self-mixing signals (SMSs) affected by noise such as speckle. These SMSs call for normalization, which is not only difficult, but also apt to distort the intrinsic information of the signals, thereby resulting in incorrect estimation of the parameters and the displacement reconstruction. In this paper, we present what we believe is a novel normalization method we call "local normalization," which enables more exact and simpler estimation and displacement retrieval compared to previous methods, for it is based on an analytic relation instead of approximation. The method is very noise-proof, and especially speckle-noise-proof as well. The method proposed can be applied to moderate and strong feedback regimes. The simplicity and accuracy of the method will provide a fine tool for a low-cost self-mixing displacement sensor with a high resolution of about 40 nm. (C) 2021 Optical Society of America

机译：从受散斑等噪声影响的自混合信号中估计自混合干涉测量参数，即光反馈因子和线宽增强因子并不容易。这些SMS要求归一化，这不仅困难，而且容易扭曲信号的固有信息，从而导致参数的错误估计和位移重建。在本文中，我们提出了一种新的标准化方法，我们称之为“局部标准化”，与以前的方法相比，它基于解析关系而不是近似，因此能够实现更精确、更简单的估计和位移检索。这种方法非常抗噪声，尤其是抗斑点噪声。该方法适用于中等和强反馈区域。该方法的简单性和准确性将为低成本、高分辨率约40nm的自混合位移传感器提供良好的工具。（2021）美国光学学会

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《Applied optics》 |2021年第8期|共6页
作者
Kim Jin-Hyok; Kim Chol-Hyon; Yun Tu-Hon; Hong Hui-Sung; Ho Kwang-Myong; Kim Kwang-Ho;
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Kim Chaek Univ Technol Laser Res Lab Seoul South Korea;

Kim Chaek Univ Technol Laser Res Lab Seoul South Korea;

Kim Chaek Univ Technol Laser Res Lab Seoul South Korea;

Kim Chaek Univ Technol Laser Res Lab Seoul South Korea;

Kim Chaek Univ Technol Laser Res Lab Seoul South Korea;

Kim Chaek Univ Technol Laser Res Lab Seoul South Korea;

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Joint estimation of self-mixing interferometry parameters and displacement reconstruction based on local normalization

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