19.1 Optical Phased-Array FMCW LiDAR with On-Chip Calibration
19.1 Optical Phased-Array FMCW LiDAR with On-Chip Calibration
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19.1 带片上校准的光学相控阵 FMCW 激光雷达
DOI：
10.1109/isscc42613.2021.9366004
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
H. Hashemi
中科院分区：
文献类型：
--
作者：
SungWon Chung;M. Nakai;Samer B. Idres;Yongwei Ni;H. Hashemi
光探测和测距（激光雷达）传感器为自动驾驶汽车和三维成像仪等各种应用提供高分辨率和高精度。在过去的几年中，激光雷达朝着紧凑、低功耗和低成本的方向发展。最近，工作在1550 nm左右的硅基大规模光学相控阵[1 - 4]沿着以及它们在激光雷达中的应用[5] [6]已经被证明。与大规模光学相控阵相关联的主要挑战是需要阵列校准的阵列上不可避免的失配。目前，所有大规模阵列都是通过使用外部光学探测器来测量聚焦远场光束光斑强度[3]或红外图像传感器来测量实验室中的远场辐射模式[1] [2] [6]来校准的。该解决方案需要远场距离处的外部检测器，自然不适合用于具有紧凑形状因子的商业应用的光学相控阵列的大规模现场部署。
Light detection and ranging (lidar) sensors provide high resolution and high accuracy for diverse applications such as autonomous vehicles and three-dimensional imagers. Over the past few years, there has been significant development towards compact, low-power, and low-cost realization of lidars. Recently, silicon-based large-scale optical phased arrays operating at around 1550nm [1 –4] along with their application in lidar [5] [6] have been demonstrated. A major challenge associated with large-scale optical phased arrays is the inevitable mismatches across the array that necessitate array calibration. At present, all large-scale arrays are calibrated by using an external optical detector for measuring focused far-field beam spot intensity [3] or infrared image sensors for measuring the far-field radiation patterns in the lab [1] [2] [6]. This solution, which requires an external detector at a far-field distance, naturally does not lend itself to large-scale field deployment of optical phased arrays for commercial applications with a compact form factor.