Dispersive Fourier transform based dual-comb ranging

Bing Chang, Teng Tan, Junting Du, Xinyue He, Yupei Liang, Zihan Liu, Chun Wang, Handing Xia, Zhaohui Wu, Jindong Wang, Kenneth K. Y. Wong, Tao Zhu, Lingjiang Kong, Bowen Li (), Yunjiang Rao () and Baicheng Yao ()
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Bing Chang: University of Electronic Science and Technology of China
Teng Tan: University of Electronic Science and Technology of China
Junting Du: University of Electronic Science and Technology of China
Xinyue He: University of Electronic Science and Technology of China
Yupei Liang: University of Electronic Science and Technology of China
Zihan Liu: University of Electronic Science and Technology of China
Chun Wang: University of Electronic Science and Technology of China
Handing Xia: China Academic of Engineering Physics
Zhaohui Wu: China Academic of Engineering Physics
Jindong Wang: Chongqing University
Kenneth K. Y. Wong: University of Hong Kong
Tao Zhu: Chongqing University
Lingjiang Kong: University of Electronic Science and Technology of China
Bowen Li: University of Electronic Science and Technology of China
Yunjiang Rao: University of Electronic Science and Technology of China
Baicheng Yao: University of Electronic Science and Technology of China

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Laser-based light detection and ranging (LIDAR) offers a powerful tool to real-timely map spatial information with exceptional accuracy and owns various applications ranging from industrial manufacturing, and remote sensing, to airborne and in-vehicle missions. Over the past two decades, the rapid advancements of optical frequency combs have ushered in a new era for LIDAR, promoting measurement precision to quantum noise limited level. For comb LIDAR systems, to further improve the comprehensive performances and reconcile inherent conflicts between speed, accuracy, and ambiguity range, innovative demodulation strategies become crucial. Here we report a dispersive Fourier transform (DFT) based LIDAR method utilizing phase-locked Vernier dual soliton laser combs. We demonstrate that after in-line pulse stretching, the delay of the flying pulses can be identified via the DFT-based spectral interferometry instead of temporal interferometry or pulse reconstruction. This enables absolute distance measurements with precision starting from 262 nm in single shot, to 2.8 nm after averaging 1.5 ms, in a non-ambiguity range over 1.7 km. Furthermore, our DFT-based LIDAR method distinctly demonstrates an ability to completely eliminate dead zones. Such an integration of frequency-resolved ultrafast analysis and dual-comb ranging technology may pave a way for the design of future LIDAR systems.

Date: 2024
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DOI: 10.1038/s41467-024-49438-z

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