Lasers, Fiber Optics, and Communications

Accuracy enhanced distance measurement system using double-sideband modulated frequency scanning interferometry

[+] Author Affiliations
Xilun Chen, Xiangchuan Wang, Shilong Pan

Nanjing University of Aeronautics and Astronautics, Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, Nanjing, China

Opt. Eng. 56(3), 036114 (Mar 25, 2017). doi:10.1117/1.OE.56.3.036114
History: Received November 25, 2016; Accepted February 22, 2017
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Abstract.  An implementation of a distance measurement system using double-sideband with suppressed carrier modulation (DSB-SC) frequency scanning interferometry is proposed to reduce the variations in the optical path and improve the measurement accuracy. In this proposed system, the electro-optic DSB-SC is used to create dual-swept signals with opposite scanning directions. For each swept signal, the relative distance between the reference arm and the measuring arm is determined by the beat frequency of signals from two arms. By multiplying both beat signals, measurement errors caused by variations in the optical path can be greatly reduced. As an experimental demonstration, a vibration was introduced in the optical path length. The experimental results show that the variations can be suppressed for over 19.9 dB.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Xilun Chen ; Xiangchuan Wang and Shilong Pan
"Accuracy enhanced distance measurement system using double-sideband modulated frequency scanning interferometry", Opt. Eng. 56(3), 036114 (Mar 25, 2017). ; http://dx.doi.org/10.1117/1.OE.56.3.036114


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