Dynamic cascade-model-based frequency-scanning interferometry for real-time and rapid absolute optical ranging | Zendy

Zhongwen Deng | Zendy; Zhigang Liu | Zendy; Xingyu Jia | Zendy; Wen Deng | Zendy; Xin Zhang | Zendy

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Dynamic 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 , interferometry , cascade , interference (communication) , nonlinear system , physics , computer science , telecommunications , engineering , channel (broadcasting) , quantum mechanics , chemical engineering

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.

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