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增强的高分辨率和远程FMCW LiDAR与直接调制的半导体激光器

Luís C P Pinto^1,2, Maria C R Medeiros^1,2

¹Instituto de Telecomunicações (IT), 3030-290 Coimbra, Portugal.

Sensors (Basel, Switzerland)

|July 12, 2025

概括

这项研究优化了使用前扭曲技术的频率调制连续波 (FMCW) LiDAR信号. 这一进步使得对自动驾驶应用至关重要的高精度,远程距离测量成为可能.

科学领域:

光子学和半导体技术技术
光学传感和计量技术

背景情况:

光检测和测距 (LiDAR) 传感器对于精确的距离和速度测量至关重要.
频调制连续波 (FMCW) LiDAR在灵敏度,范围分辨率和速度测量方面具有优势.
将LiDAR集成到半导体芯片中,有望降低成本,尺寸和功耗.

研究的目的:

为应对用于FMCW信号生成的半导体激光器非线性挑战.
开发一种方法来预先扭曲驱动波形,以实现线性FMCW信号.
为了展示适合自动驾驶的高性能FMCW LiDAR系统.

主要方法:

采用预扭曲技术来弥补半导体激光器内在的声非线性.
为半导体激光器的直流调制优化驱动波形.
在55kHz的上坡和下坡信号中,实现了0.0029%的频率非线性.

主要成果:

展示了一个高度准确的LiDAR系统,范围分辨率低于5厘米.
通过单模光纤传输实现了在210米范围内的操作.
额外推算的自由空间操作范围大约为308米.

结论:

预扭曲有效地使FMCW信号从直接调制的半导体激光器线性化.
开发的LiDAR系统满足了远程自动驾驶的关键要求.
这项工作为具有成本效益,高性能LiDAR集成铺平了道路.

关键词:

在FMCW LiDAR中使用.奇尔普线性化线性化半导体激光器半导体激光器

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