Open AccessDynamic cascade-model-based frequency-scanning interferometry for real-time and rapid absolute optical ranging
Author(s) -
Zhongwen Deng,
Zhigang Liu,
Xingyu Jia,
Wen Deng,
Xin Zhang
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.021929
Subject(s) - ranging , optics , cascade , interferometry , interference (communication) , nonlinear system , extended kalman filter , physics , kalman filter , computer science , telecommunications , engineering , channel (broadcasting) , quantum mechanics , chemical engineering , artificial intelligence
A new frequency-scanning interferometry (FSI) scheme using in-phase and quadrature (IQ) detection for real-time and rapid absolute optical ranging is presented. Dynamic measurement with FSI modulates interference signal frequency by both target movement and time-varying optical-frequency scanning rate; hence, a dynamic model is proposed to decouple dynamic absolute distance from the instantaneous frequency of interference signals. The unscented Kalman filter and particle filter algorithms are implemented for the nonlinear first-layer and non-Gaussian second-layer models, respectively. The proposed FSI scheme eliminates nonlinear optical-frequency scanning effects in dynamic measurements and realizes real-time measurement only current observed data are used. Experimental results verify high tracking performance for a vibrating target with approximately 10 μm amplitude and 50-500 Hz frequency.