连贯多普勒激光雷达 (Coherent Doppler LIDAR) 使用长时间的频率调制脉冲进行风感应
Optics express
|January 5, 2024
概括
一种新的频率调制连续波多普勒激光雷达 (FMCDL) 消除了传统脉冲CDL系统中发现的距离-速度分辨率权衡. 这种经过验证的原型证明了改进的风距离和速度测量性能.
科学领域:
- 大气科学 大气科学
- 光学遥感器 远程传感器
背景情况:
- 传统的连贯多普勒激光雷达 (CDL) 系统使用短时间单频脉冲 (PCDL) 面临距离和速度分辨率之间的权衡.
- 为了克服这一局限性,以前提出了一种使用长时间频率调制脉冲的频率调制CDL (FMCDL) 的理论框架.
研究的目的:
- 展示和验证一个连贯的多普勒激光雷达 (CDL) 原型,能够同时使用脉冲 (PCDL) 和频调制 (FMCDL) 长时间脉冲.
- 通过实验验证FMCDL在消除距离-速度分辨率权衡方面的理论优势.
主要方法:
- 开发一个可配置为PCDL和FMCDL操作的原型CDL系统.
- 对原型在PCDL和FMCDL模式中获得的数据进行比较分析,用于风距离和速度测量.
- 对FMCDL性能指标的定量评估,包括接收功率和分辨率,与理论预测相比.
主要成果:
- 原型的FMCDL模式展示了有效的风距离和速度测量,与PCDL模式有很好的一致性.
- 实验结果量化证实了FMCDL在理论上预期的性能,特别是在接收功率和分辨率方面.
- 在没有PCDL固有的距离-速度分辨率权衡特征的情况下,FMCDL成功运行.
结论:
- 开发的FMCDL原型成功验证了理论框架,证明了其消除距离-速度分辨率权衡的能力.
- FMCDL在多普勒激光雷达技术中提供了一个有前途的进步,用于准确和高分辨率的大气测量.
- 该系统在接收功率和分辨率方面的性能与理论预期保持一致,为实际应用铺平了道路.
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