Silicon Photonics FMCW LiDAR Chip With a Slow-Light Grating Beam Scanner
Silicon Photonics FMCW LiDAR Chip With a Slow-Light Grating Beam Scanner
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DOI：
10.1109/jstqe.2022.3157824
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发表时间：
2022-09-01
影响因子：
4.9
通讯作者：
Kurahashi, Ryo
中科院分区：
文献类型：
--
作者：
Baba, Toshihiko;Tamanuki, Takemasa;Kurahashi, Ryo
利用硅光子学制造的光子晶体慢光光栅通过热光学效应实现了高速、高分辨率和宽视场的二维光束扫描。本文采用波束扫描器与锗光电二极管相结合的方式，在芯片上构建了一种调频连续波光检测与测距系统，用于延迟同差相干检测。发射扫描频扫激光束，得到154 x 32 = 4928个点的点云图。演示了该系统的实时操作和速度成像。该装置有望通过合理减少芯片和光学损耗以及抑制内部噪声组件，在100米级的远距离上探测兰伯特目标。
Photonic crystal slow-light gratings fabricated using Si photonics enable high-speed, high-resolution, and wide field-of-view two-dimensional beam scanning via the thermo-optic effect. In this paper, we built a frequency-modulated continuous-wave light detection and ranging system on a chip by combining a beam scanner with Ge photodiodes for delay homodyne coherent detection. Emitting and scanning frequency-swept laser beam, point cloud images of 154 x 32 = 4928 points were obtained. The real-time operation and velocity imaging were also demonstrated. This device is expected to detect Lambertian targets over long distances in the 100-m class by reasonably reducing chip and optics losses and suppressing internal noise components.