Improving the measurement performance for a self-mixing interferometry-based displacement sensing system

TLDR: Combining the new algorithms for estimating the laser phase and updating C value, the paper finally presents a novel technique for displacement measurement with improved accuracy performance in contrast to existing techniques.

Abstract: Approaches that are, to our knowledge, novel, are proposed in this paper to improve the accuracy performance of self-mixing interferometry (SMI) for displacement measurement First, the characteristics associated with signals observed in SMI systems are studied, based on which a new procedure is proposed for achieving accurate estimation of the laser phase The studies also revealed the reasons for the inherent errors associated with the existing SMI-based techniques for displacement measurement Then, this paper presents a new method for estimating the optical feedback level factor (denoted by C) in real time Combining the new algorithms for estimating the laser phase and updating C value, the paper finally presents a novel technique for displacement measurement with improved accuracy performance in contrast to existing techniques The proposed technique is verified by both simulation and experimental data

Full text

University of Wollongong University of Wollongong
Research Online Research Online
Faculty of Informatics - Papers (Archive)
Faculty of Engineering and Information
Sciences
2011
Improving the measurement performance for a self-mixing interferometry-Improving the measurement performance for a self-mixing interferometry-
based displacement sensing system based displacement sensing system
Yuanlong Fan
Yanguang Yu
University of Wollongong
, yanguang@uow.edu.au
Jiangtao Xi
jiangtao@uow.edu.au
Jose Chicharo
Follow this and additional works at: https://ro.uow.edu.au/infopapers
Part of the Physical Sciences and Mathematics Commons
Recommended Citation Recommended Citation
Fan, Yuanlong; Yu, Yanguang; Xi, Jiangtao; and Chicharo, Jose: Improving the measurement performance
for a self-mixing interferometry-based displacement sensing system 2011.
https://ro.uow.edu.au/infopapers/3630
Research Online is the open access institutional repository for the University of Wollongong. For further information
contact the UOW Library: research-pubs@uow.edu.au

Improving the measurement performance for a self-mixing interferometry-based Improving the measurement performance for a self-mixing interferometry-based
displacement sensing system displacement sensing system
Abstract Abstract
Approaches that are, to our knowledge, novel, are proposed in this paper to improve the accurancy
performance of self-mixing interferometruy (SMI). First the characteristics associated with signals
observed in SMI systems are studied, based on which a new procedure is proposed for achieving
accurate estimation of the laser phase.
Disciplines Disciplines
Physical Sciences and Mathematics
Publication Details Publication Details
Y. Fan, Y. Yu, J. Xi & J. F. Chicharo, "Improving the measurement performance for a self-mixing
interferometry-based displacement sensing system," Applied Optics, vol. 50, (26) pp. 5064-5072, 2011.
This journal article is available at Research Online: https://ro.uow.edu.au/infopapers/3630