该研究团队引入了一种光源——混沌微梳来克服用于并行检测的光源和测量原理受到时间和频域拥塞严重限制的问题。这种物理熵光源表现出自然正交的光通道，不受任何拥塞问题的影响。基于这种微梳态，研究人员展示了一种新型的激光雷达——并行混沌激光雷达，不仅无干扰且具有极简化的系统结构。他们的方法还实现了并行激光雷达之间最先进的测距性能:毫米级的测距精度和毫米/秒级的速度分辨率。结合所有这些理想的特性，该技术有可能重塑整个激光雷达生态系统。
据悉，自动驾驶汽车传感器对高扫描精度和分辨率的需求促使了光探测和测距（LiDAR：激光雷达）技术并行化的快速发展。然而，对于现有的两大激光雷达类型——飞行时间和频率调制连续波，目前用于并行检测的光源和测量原理受到时间和频域拥塞的严重限制，导致测量性能下降和系统复杂性增加。
附：英文原文
Title: Breaking the temporal and frequency congestion of LiDAR by parallel chaos
Author: Chen, Ruixuan, Shu, Haowen, Shen, Bitao, Chang, Lin, Xie, Weiqiang, Liao, Wenchao, Tao, Zihan, Bowers, John E., Wang, Xingjun
Issue&Volume: 2023-03-13
Abstract: The rising demand for high scanning accuracy and resolution in sensors for self-driving vehicles has led to the rapid development of parallelization in light detection and ranging (LiDAR) technologies. However, for the two major existing LiDAR categories—time-of-flight and frequency-modulated continuous wave—the light sources and measurement principles currently used for parallel detection face severe limitations from time- and frequency-domain congestion, leading to degraded measurement performance and increased system complexity. In this work we introduce a light source—the chaotic microcomb—to overcome this problem. This physical entropy light source exhibits naturally orthogonalized light channels that are immune to any congestion problem. Based on this microcomb state, we demonstrate a new type of LiDAR—parallel chaotic LiDAR—that is interference-free and has a greatly simplified system architecture. Our approach also enables the state-of-the-art ranging performance among parallel LiDARs: millimetre-level ranging accuracy and millimetre-per-second-level velocity resolution. Combining all of these desirable properties, this technology has the potential to reshape the entire LiDAR ecosystem.
DOI: 10.1038/s41566-023-01158-4
Source: https://www.nature.com/articles/s41566-023-01158-4