Frequency-modulated comb LIDAR
Frequency-modulated comb LIDAR
复制标题
DOI：
10.1063/1.5120321
复制
发表时间：
2019-10-01
期刊：
影响因子：
5.6
通讯作者：
Fermann, M. E.
中科院分区：
文献类型：
--
作者：
Kuse, N.;Fermann, M. E.
调频连续波激光雷达 (FMCW LIDAR) 已广泛用于科学和工业工具。在本报告中，提出了一种基于光学频率梳的新型激光雷达技术，称为调频梳状激光雷达（FMcomb LIDAR）。 FMcomb LIDAR 不使用 FMCW LIDAR 等单一载波，而是使用光学频率梳中的多个载波。由于梳状模式之间的相关性，每个频率扫描的梳状模式可以相干拼接，从而允许分辨率相当于通过许多梳状模式扫描而仅通过梳状模式间隔扫描。在概念验证实验中，电光频率梳 (EO 梳) 的三种梳模式被连贯拼接，显示出 10 ps（即空气中 1.5 mm）的傅里叶变换有限分辨率（定义为 FWHM 线宽），延迟时间约为 65 ns。当考虑相同扫描范围时，所获得的分辨率是传统FMCW激光雷达的三倍。 (C) 2019 年作者。
Frequency-modulated continuous-wave LIDAR (FMCW LIDAR) has been widely used for both scientific and industrial tools. Here, in this report, a new class of LIDAR technique based on an optical frequency comb, named frequency-modulated comb LIDAR (FMcomb LIDAR), is proposed. Instead of using one carrier such as FMCW LIDAR, the multiple carriers from an optical frequency comb are used in FMcomb LIDAR. Because of the correlation between comb modes, each frequency-scanned comb mode can be coherently stitched, thus allowing for a resolution equivalent to scanning by many comb modes while scanning only by the comb mode spacing. In a proof-of-concept experiment, three comb modes from an electro-optic frequency comb (EO comb) are coherently stitched, showing Fourier-transform limited resolution (defined as FWHM linewidth) of 10 ps (i.e., 1.5 mm in air) for about 65 ns delay. The obtained resolution is three-times higher than that of conventional FMCW LIDAR when the same scan range is considered. (C) 2019 Author(s).