3D imaging techniques are facilitating autonomous vehicles to build intelligent systems. Optical phased arrays (OPAs) featured by all solid‐state configurations are becoming a promising solution for 3D imaging. However, the majority of state‐of‐art OPAs commonly suffer from severe power degradation at the edge of the field of view (FoV), resulting in limited effective FoV and deteriorating 3D imaging quality. Here, the chained grating antenna and the vernier concept is synergized to design a novel OPA for realizing a record wide 160°‐FoV 3D imaging. By virtue of the chained antenna, the OPA exhibits less than 3‐dB beam power variation within the 160°FoV. In addition, two OPAs with different pitches are integrated monolithically to form a quasi‐coaxial Vernier OPA transceiver. With the aid of a flat beam power profile provided by the chained antennas, the OPA exhibits uniform beam quality at an arbitrary steering angle. The superior beam steering performance enables the OPA to accomplish 160° wide‐FoV 3D imaging based on the frequency‐modulated continuous‐wave (FMCW) LiDAR scheme. The ranging accuracy is 5.5‐mm. Moreover, the OPA is also applied to velocity measurement for 4D sensing. To the best of knowledge, it is the first experimental implementation of a Vernier OPA LiDAR on 3D imaging to achieve a remarkable FoV.

中文翻译：

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用于超宽视场和 4D 传感的 SiN-On-SOI 光学相控阵激光雷达

3D 成像技术正在促进自动驾驶汽车构建智能系统。具有全固态配置的光学相控阵 (OPA) 正在成为 3D 成像的一种有前景的解决方案。然而，大多数最先进的 OPA 通常会在视场 (FoV) 边缘出现严重的功率衰减，导致有效 FoV 有限且 3D 成像质量恶化。在这里，链式光栅天线和游标概念相结合，设计出一种新颖的 OPA，以实现创纪录的 160° FoV 3D 成像。凭借链式天线，OPA 在 160°FoV 内表现出小于 3dB 的波束功率变化。此外，两个不同间距的 OPA 单片集成，形成准同轴 Vernier OPA 收发器。借助链式天线提供的平坦波束功率分布，OPA 在任意转向角下表现出均匀的波束质量。卓越的波束控制性能使 OPA 能够基于调频连续波 (FMCW) LiDAR 方案实现 160° 宽视场 3D 成像。测距精度为5.5毫米。此外，OPA 还应用于 4D 传感的速度测量。据了解，这是 Vernier OPA LiDAR 在 3D 成像上的首次实验性实施，以实现卓越的 FoV。