J4 ›› 2013, Vol. 30 ›› Issue (1): 42-45.

• 激光雷达专辑 • 上一篇    下一篇

原子法拉第效应器件稳频与鉴频测速的多普勒激光雷达

李发泉1,林鑫1,2,程学武1,杨勇1,2,武魁军1,2,龚顺生1   

  1. 1中国科学院武汉物理与数学研究所,波谱与原子分子物理国家重点实验室,湖北 武汉,430071 
    2中国科学院研究生院,北京,100049
  • 出版日期:2013-01-28 发布日期:2013-01-11
  • 通讯作者: 李发泉(1970-),山东淄博人,研究员,主要研究方向:基于原子分子高光谱分辨的光电探测原理与技术研究 E-mail:lifaquan@wipm.ac.cn。
  • 基金资助:

    国家自然科学基金项目(41127901)

A Doppler lidar with atomic Faraday devices frequency stabilization and discrimination

Li Faquan 1,Li Xin 1,2,Cheng Xuewu 1,Yang Yong 1,2,Wu Kuijun 1,2,Gong Shunsheng 1   

  1. 1Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan 430071, China; 
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Published:2013-01-28 Online:2013-01-11

摘要:

利用FADOF透射频谱曲线稳定而又可调谐的特点,设计了一种测速多普勒激光雷达,一方面用其对发射激光稳频,同时用同种原子的FADOF对回波光鉴频,使发射激光频率和鉴频曲线建立了相对稳定的关系,可有利于提高测速精度。试验系统采用Cs原子FADOF,在-40~+40m/s的测速范围内,测速误差为±0.74m/s。

关键词: 激光技术, 激光雷达, 多普勒测速, 原子滤光, 原子稳频

Abstract:

A Doppler lidar was reported in which the laser frequency is stabilized and the backscattered light frequency is discriminated by a multi-peak and a less-peak atomic Faraday anomalous dispersion optical filter (FADOF),respectively. The transmission spectrum of the FADOF is stable as it is based on an atomic transition, and slightly tunable with a magnet due to Zeeman effect. The high frequency stability of the FADOF provides a high velocity accuracy; and the tunability of the FADOF transmission spectrum makes the measurement range flexible. We described an experimental lidar system based on cesium FADOFs, and the experimental error is of 0.74 m/s over velocities ranging from -40 to +40 m/s.

Key words: laser techniques, Doppler lidar, Doppler velocity measurement, atomic optical ?lter, atomic frequency stabilization