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Proceedings Paper

Absolute distance measurement by dispersive interferometry using an electro-optic comb
Author(s): Xianyu Zhao; Xinghua Qu; Fumin Zhang
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Paper Abstract

We experimentally demonstrated a method for distance measurement using an electro-optic comb based on dispersive interferometry. An electro-optic comb with the repetition frequency of 10 GHz generated by cascaded phase modulators was adopted as the laser source, and a spectrometer with a sampling interval of 0.02 nm was employed to acquire spectral interference signals. Thus, the non-ambiguity range of about 1.5 cm was obtained in this ranging scheme. Subsequently, a low-cost laser range finder with the accuracy of about 1 mm was employed to work as a rough measurement, and the dispersion interference device worked as fine measurement to conduct an absolute distance measurement. Actual tests proved an agreement within 20 μm over 20 m distance.

Paper Details

Date Published: 12 March 2020
PDF: 9 pages
Proc. SPIE 11439, 2019 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 114390X (12 March 2020); doi: 10.1117/12.2543500
Show Author Affiliations
Xianyu Zhao, Tianjin Univ. (China)
Xinghua Qu, Tianjin Univ. (China)
Fumin Zhang, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 11439:
2019 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems
Jigui Zhu; Kexin Xu; Hai Xiao; Sen Han, Editor(s)

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