Light detection and ranging (LiDAR) is a ubiquitous tool to provide precise spatial awareness in various perception environments. A bionic LiDAR that can mimic human-like vision by adaptively gazing at selected regions of interest within a broad field of view is crucial to achieve high-resolution imaging in an energy-saving and cost-effective manner. However, current LiDARs based on stacking fixed-wavelength laser arrays and inertial scanning have not been able to achieve the desired dynamic focusing patterns and agile scalability simultaneously. Moreover, the ability to synchronously acquire multi-dimensional physical parameters, including distance, direction, Doppler, and color, through seamless fusion between multiple sensors, still remains elusive in LiDAR. Here, we overcome these limitations and demonstrate a bio-inspired frequency-modulated continuous wave (FMCW) LiDAR system with dynamic and scalable gazing capability. Our chip-scale LiDAR system is built using hybrid integrated photonic solutions, where a frequency-chirped external cavity laser provides broad spectral tunability, while on-chip electro-optic combs with elastic channel spacing allow customizable imaging granularity. Using the dynamic zoom-in capability and the coherent FMCW scheme, we achieve a state-of-the-art resolution of 0.012 degrees, providing up to 15 times the resolution of conventional 3D LiDAR sensors, with 115 equivalent scanning lines and 4D parallel imaging. We further demonstrate cooperative sensing between our adaptive coherent LiDAR and a camera to enable high-resolution color-enhanced machine vision.
Multi-mode Coherent Detection Ghost Imaging Lidar and Vibration-Mode Imaging
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences（中国科学院上海光学精密机械研究所）；University of Chinese Academy of Sciences（中国科学院大学）；Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences（中国科学院大学杭州高等研究院）
Event-based Scheimpflug LiDAR for Ultra-Fast Laser-Scanned Rangefinding
Georgia Tech Research Institute（佐治亚理工学院研究所）；University of Arizona, Wyant College of Optical Sciences（亚利桑那大学怀亚特光学学院）；Boston University, Department of Electrical and Computer Engineering（波士顿大学电气与计算机工程系）；Georgia Institute of Technology, George W. Woodruff School of Mechanical Engineering（佐治亚理工学院乔治·W·伍德拉夫机械工程学院）；Embry-Riddle Aeronautical University, Department of Mechanical Engineering（埃姆布里-里德尔航空大学机械工程系）
A Robust Hertz-Linewidth Quantum-Dot Coherent Swept Source with Adaptive Self-Linearization
State Key Laboratory for Extreme Photonics and Instrumentation, Zhejiang Key Laboratory of Optoelectronic Information Technology, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zhejiang University（浙江大学）；State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University（中山大学）；China Jiliang University（中国计量大学）；Intelligent Optics and Photonics Research Center, Jiaxing Research Institute, Zhejiang University（浙江大学嘉兴研究院）
Achieving Full Grating-Lobe-Free Field-of-View with Low-Complexity Co-prime Photonic Beamforming Transceivers
集成的光子有源波束形成可以显著降低用于LiDAR和医学成像应用的相干成像器的尺寸和成本。在当前的架构中，光子和电子电路的复杂性随着期望的成像分辨率而线性增加。我们提出了一种新的光子收发器架构的基础上互质采样技术，打破了这种权衡，并实现了完整的（辐射元件有限）的视场（FOV）的二维孔径与单频激光。仅使用N阶辐射元件，该架构实现了与具有半波长间隔的N平方阶元件的收发器等效的波束宽度和旁瓣电平（SLL）性能。此外，我们采用脉冲幅度调制（PAM）行-列驱动方法，以减少所需的电子驱动器的数量为这个架构从N的顺序到N的平方根的顺序。使用两个64元件孔径（一个用于发射，一个用于接收）的这种架构的硅光子实现仅需要34个PAM电驱动器，并且实现了具有1026个总可分辨点的-11.3dB的收发器SLL，以及在23 X 16.3度FOV内的0.6度波束宽度。
