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Chang B, Tan T, Du J, He X, Liang Y, Liu Z, Wang C, Xia H, Wu Z, Wang J, Wong KKY, Zhu T, Kong L, Li B, Rao Y, Yao B. Dispersive Fourier transform based dual-comb ranging. Nat Commun 2024; 15:4990. [PMID: 38862530 PMCID: PMC11167001 DOI: 10.1038/s41467-024-49438-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 06/05/2024] [Indexed: 06/13/2024] Open
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.
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Affiliation(s)
- Bing Chang
- Key Laboratory of Optical Fiber Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Teng Tan
- Key Laboratory of Optical Fiber Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu, 611731, China
- School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China
- Institute of Electronic and Information Engineering of UESTC, Guangdong, 523808, China
| | - Junting Du
- Key Laboratory of Optical Fiber Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Xinyue He
- Key Laboratory of Optical Fiber Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Yupei Liang
- Key Laboratory of Optical Fiber Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Zihan Liu
- Key Laboratory of Optical Fiber Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Chun Wang
- Key Laboratory of Optical Fiber Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu, 611731, China
- Research Center of Laser Fusion, China Academic of Engineering Physics, Mianyang, 621900, China
| | - Handing Xia
- Research Center of Laser Fusion, China Academic of Engineering Physics, Mianyang, 621900, China
| | - Zhaohui Wu
- Research Center of Laser Fusion, China Academic of Engineering Physics, Mianyang, 621900, China
| | - Jindong Wang
- Key Laboratory of Optoelectronic Technology & Systems (Education Ministry of China), Chongqing University, Chongqing, 400044, China
| | - Kenneth K Y Wong
- Department of Electrical and Electronic Engineering, University of Hong Kong, Pokfulam Road, Hong Kong SAR, 990777, China
| | - Tao Zhu
- Key Laboratory of Optoelectronic Technology & Systems (Education Ministry of China), Chongqing University, Chongqing, 400044, China
| | - Lingjiang Kong
- School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Bowen Li
- Key Laboratory of Optical Fiber Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu, 611731, China.
| | - Yunjiang Rao
- Key Laboratory of Optical Fiber Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu, 611731, China.
- Research Centre for Optical Fiber Sensing, Zhejiang Laboratory, Hangzhou, 310000, China.
| | - Baicheng Yao
- Key Laboratory of Optical Fiber Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu, 611731, China.
- Engineering Center of Integrated Optoelectronic & Radio Meta-chips, University of Electronic Science and Technology, Chengdu, 611731, China.
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Han Y, Zang Z, Wu L, Hao Y, Zhu Q, Chang-Hasnain C, Fu HY. Enhancing the field-of-view of spectral-scanning FMCW LiDAR by multipass configuration with an echelle grating. OPTICS LETTERS 2024; 49:3267-3270. [PMID: 38824380 DOI: 10.1364/ol.525191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Accepted: 05/13/2024] [Indexed: 06/03/2024]
Abstract
We present a spectral-scanning frequency-modulated continuous wave (FMCW) 3D imaging system capable of producing high-resolution depth maps with an extended field of view (FOV). By employing a multipass configuration with an echelle grating, the system achieves an FOV of 5.5° along the grating axis. The resulting depth maps have a resolution of 70 × 40 pixels, with a depth resolution of 5.1 mm. The system employs an echelle grating for beam steering and leverages the multipass configuration for angular FOV magnification. Quantitative depth measurements and 3D imaging results of a static 3D-printed depth variation target are demonstrated. The proposed approach offers a promising solution for enhancing the FOV of spectral-scanning FMCW LiDAR systems within a limited wavelength-swept range, thereby reducing system complexity and cost, paving the way for improved 3D imaging applications.
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Jeong D, Jang H, Jung MU, Jeong T, Kim H, Yang S, Lee J, Kim CS. Spatio-spectral 4D coherent ranging using a flutter-wavelength-swept laser. Nat Commun 2024; 15:1110. [PMID: 38321004 PMCID: PMC10847489 DOI: 10.1038/s41467-024-45297-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 01/18/2024] [Indexed: 02/08/2024] Open
Abstract
Coherent light detection and ranging (LiDAR), particularly the frequency-modulated continuous-wave LiDAR, is a robust optical imaging technology for measuring long-range distance and velocity in three dimensions (3D). We propose a spatio-spectral coherent LiDAR based on a unique wavelength-swept laser to enable both axial coherent ranging and lateral spatio-spectral beam scanning simultaneously. Instead of the conventional unidirectional wavelength-swept laser, a flutter-wavelength-swept laser (FWSL) successfully decoupled bidirectional wavelength modulation and continuous wavelength sweep, which overcame the measurable distance limited by the sampling process. The decoupled operation in FWSL enabled sequential sampling of flutter-wavelength modulation across its wide spectral bandwidth of 160 nm and, thus, allowed simultaneous distance and velocity measurement over an extended measurable distance. Herein, complete four-dimensional (4D) imaging, combining real-time 3D distance and velocity measurements, was implemented by solid-state beam scanning. An acousto-optic scanner was synchronized to facilitate the other lateral beam scanning, resulting in an optimized solid-state coherent LiDAR system. The proposed spatio-spectral coherent LiDAR system achieved high-resolution coherent ranging over long distances and real-time 4D imaging with a frame rate of 10 Hz, even in challenging environments.
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Affiliation(s)
- Dawoon Jeong
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan, 46241, Korea
- Engineering Research Center for Color-Modulated Extra-Sensory Perception Technology, Pusan National University, Busan, 46241, Korea
| | - Hansol Jang
- Ground Technology Research Institute, Agency for Defense Development, Daejeon, 34186, Korea
| | - Min Uk Jung
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan, 46241, Korea
- Engineering Research Center for Color-Modulated Extra-Sensory Perception Technology, Pusan National University, Busan, 46241, Korea
| | - Taeho Jeong
- Energy Device Research Team, Hyundai Motor Company, Uiwang, Gyeonggi, 16082, Korea
| | - Hyunsoo Kim
- Electromagnetic Energy Materials Research Team, Hyundai Motor Company, Uiwang, Gyeonggi, 16082, Korea
| | - Sanghyeok Yang
- Electromagnetic Energy Materials Research Team, Hyundai Motor Company, Uiwang, Gyeonggi, 16082, Korea
| | - Janghyeon Lee
- Electromagnetic Energy Materials Research Team, Hyundai Motor Company, Uiwang, Gyeonggi, 16082, Korea
| | - Chang-Seok Kim
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan, 46241, Korea.
- Engineering Research Center for Color-Modulated Extra-Sensory Perception Technology, Pusan National University, Busan, 46241, Korea.
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