激光与光电子学进展, 2015, 52 (6): 060001, 网络出版: 2015-04-02
激光回馈传感应用研究进展 下载: 671次
Study of Optical Feedback and Its Application Progress
测量 传感测量 激光回馈 自混合干涉 位移测量 速度测量 散斑效应 measurement sensing measurement laser feedback self-mixing interference displacement measurement velocity measurement speckle effect
摘要
介绍了激光回馈的概念及其两种主要的理论研究模型:三镜腔模型和注入锁定模型。激光回馈干涉仪相位灵敏度与传统双光束干涉仪相当,且具有结构简单、紧凑、易准直、对激光器无特殊要求等突出优势。重点介绍了激光回馈干涉仪在位移、速度等参量测量及生物传感领域的发展应用。当被测表面为漫反射表面时,散斑的存在将导致自混合信号的振幅衰减,并引入随机相位误差。总结了自混合干涉系统中的散斑效应及改良技术手段,介绍了散斑效应在传感测量领域的发展应用。
Abstract
The concept of optical feedback and a theoretical analysis of two models are introduced, inclubing Fabry-Perot cavity and the injection model. Compared with traditional two-beams interferometer, self-mixing interferometer not only has similar phase sensitivity, but also has inherent simplicity, compactness and robustness, as well as the self-aligning capability. Applications in interferometry are presented, such as displacement sensor, velocimeter sensor, as well as biomedical sensor. Speckle effect occurs when a coherent light is back-reflected from a rough surface, the self-mixing signal can be affected. The amplitude fading as well as the speckle phase error of the self-mixing signal due to the speckle effect are analyzed. The methods to alleviate the amplitude fading of the self-mixing signal are reviewed, yet the applications of speckle self-mixing interferometer are summarized.
傅杨颖, 肖光宗, 张斌. 激光回馈传感应用研究进展[J]. 激光与光电子学进展, 2015, 52(6): 060001. Fu Yangying, Xiao Guangzong, Zhang Bin. Study of Optical Feedback and Its Application Progress[J]. Laser & Optoelectronics Progress, 2015, 52(6): 060001.