Investigations on the non-ambiguity range extension of dual-comb ranging by repetition range variation

Zhiqi Xie; Yang Liu; Mingzhao He; Shiying Cao; Dongjing Miao; Jiusun Zeng; Jianshuang Li

doi:10.1117/12.2651904

23 January 2023 Investigations on the non-ambiguity range extension of dual-comb ranging by repetition range variation

Zhiqi Xie, Yang Liu, Mingzhao He, Shiying Cao, Dongjing Miao, Jiusun Zeng, Jianshuang Li

Proceedings Volume 12557, AOPC 2022: Optical Sensing, Imaging, and Display Technology; 125571V (2023) https://doi.org/10.1117/12.2651904
Event: Applied Optics and Photonics China 2022 (AOPC2022), 2022, Beijing, China

Abstract

Absolute distance measurement based on the dual-comb system is a promising tool for the large-scale measurement in the industrial field. There are two combs with slightly different repetition rates in the dual-comb system, and the distance information could be obtained by the asynchronous optical sampling (ASOPS). However, the measured range could be limited within the pulse-to-pulse interval range by the non-ambiguity range (NAR) without the extension. This paper proposes a method to extend the unambiguous range by changing the repetition range. Firstly, the method of dual-comb ranging and the principle of extending the non-ambiguity range were introduced. Secondly, the two implementations of changing single repetition frequency and switching repetition frequency were compared through simulation. Then, according to the simulated results, the effective conditions and theoretical maximum range of extended ranging were clarified. Finally, a long absolute distance measurement was designed and the ranging results of switching repetition frequency were compared with the conventional incremental interferometer, which proves that this method is reliable for extending the non-ambiguous range.

Citation Download Citation

Zhiqi Xie, Yang Liu, Mingzhao He, Shiying Cao, Dongjing Miao, Jiusun Zeng, and Jianshuang Li "Investigations on the non-ambiguity range extension of dual-comb ranging by repetition range variation", Proc. SPIE 12557, AOPC 2022: Optical Sensing, Imaging, and Display Technology, 125571V (23 January 2023); https://doi.org/10.1117/12.2651904

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KEYWORDS

Repetition frequency

Ranging

Distance measurement

Switching

Interferometers

Frequency combs

Metrology

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