Overall Non-Mechanical Spectrally Steered LiDAR Using Chirped Amplitude-Modulated Phase-Shift Method
Overall Non-Mechanical Spectrally Steered LiDAR Using Chirped Amplitude-Modulated Phase-Shift Method
复制标题
使用啁啾调幅相移方法的整体非机械光谱引导激光雷达
DOI：
10.1109/jlt.2021.3131027
复制
发表时间：
2022
影响因子：
4.7
通讯作者：
Set Sze Y.
中科院分区：
文献类型：
--
作者：
Zhang Zheyuan;Zhang Chao;Shirahata Takuma;Yamashita Shinji;Set Sze Y.
我们提出并演示了一种使用色散调谐扫描激光器（DTSL）和无源衍射元件的整体非机械光谱制导激光测距仪。DTSL没有机械运动部件，使其有可能实现无惯性的高波长扫描速度。DTSL固有的强度调制特性允许应用调制相移方法，类似于用于调幅连续波（AMCW）测距仪的方法。由于DTSL的脉冲重复率是啁啾的，标准的信号处理技术不适用于AMCW。在本文中，我们提出了一种新的啁啾调幅相移（CAMPS）方法，并结合信号处理技术从啁啾调幅信号中获取相移信息。作为概念验证，我们展示了在10 kHz扫描速度下轴向测距分辨率为~ 50 μm的CAMPS激光雷达。
We propose and demonstrate an overall non-mechanical spectrally steered laser rangefinder using the dispersion-tuned swept laser (DTSL) and a passive diffractive element. The DTSL has no mechanical moving parts, making it possible to achieve an inertial-free high wavelength sweeping speed. The inherent intensity-modulation characteristic of the DTSL allows the modulation phase-shift method to be applied, similar to that used for an amplitude-modulated continuous-wave (AMCW) rangefinder. Since the pulse repetition rate of the DTSL is chirped, standard signal processing techniques for AMCW are not applicable. In this paper, we propose a novel chirped amplitude-modulated phase-shift (CAMPS) method with a signal processing technique to obtain the phase-shift information from a chirped amplitude-modulated signal. As a proof of concept, we demonstrated the CAMPS LiDAR with an axial ranging resolution of ∼50 μm at a scanning speed of 10 kHz.