Measuring two vibrations using dual-external-cavity structure in a self-mixing system. (June 2021)

• Record Type: Journal Article
• Authors: Cui, Xiangyu; Liu, Yuwei; Chen, Peng; Li, Chunsheng
• Is Part Of: Optics and lasers in engineering. Volume 141(2021)
• Publication Date: 2021-06
• Subjects: Dual-external-cavity structure -- self-mixing interference -- measurement two vibrations simultaneously; Lasers in engineering -- Periodicals; Optical measurements -- Periodicals; Optics -- Periodicals; Lasers en ingénierie -- Périodiques; Mesures optiques -- Périodiques; Optique -- Périodiques; 621.36605
• DOI: 10.1016/j.optlaseng.2021.106557
• Languages: English
• ISSNs: 0143-8166

Abstract

Highlights: This paper introduces a new dual-external-cavity structure in self-mixing interference system to be used with a semiconductor laser, This paper develops an improved algorithm for dominant and secondary harmonic order determination based on Fourier transform. The simulation and experimental results demonstrate that the proposed system can measure two vibrations simultaneously by using only a single detector and a single laser. Compared the algorithm for dominant harmonic order determination proposed with the previous paper, the proposed improved algorithm can provide robust estimations of the vibration frequencies and amplitudes of two objects simultaneously. Based on the reviewers' comments, we have carefully revised the article, and the changes in the manuscript, which we have marked in blue. Abstract: This paper introduces a new dual-external-cavity structure in self-mixing interference system to be used with a semiconductor laser, and develops an improved algorithm for dominant and secondary harmonic order determination based on Fourier transform. The simulation and experimental results demonstrate that the proposed system can measure two vibrations simultaneously by using only a single detector and a single laser.