J4 ›› 2011, Vol. 38 ›› Issue (3): 159-163.doi: 10.3969/j.issn.1001-2400.2011.03.026

• 研究论文 • 上一篇    下一篇

基于双频脉冲激光器的距离多普勒探测

李艳辉;吴振森   

  1. (西安电子科技大学 理学院,陕西 西安  710071)
  • 收稿日期:2010-06-12 出版日期:2011-06-20 发布日期:2011-07-14
  • 通讯作者: 李艳辉
  • 作者简介:李艳辉(1979-),女,西安电子科技大学博士研究生,E-mail: wuzhs@mail.xidian.edu.cn.
  • 基金资助:

    国家自然科学基金资助项目(60771038);瞬态光学与光子技术国家重点实验室开放基金资助项目(SKLST200906);中央高校基本科研业务费专项基金资助项目(K50510070009)

Range Doppler detection based on the pulsed two-frequency laser

LI Yanhui;WU Zhensen   

  1. (School of Science, Xidian Univ., Xi'an   710071, China)
  • Received:2010-06-12 Online:2011-06-20 Published:2011-07-14
  • Contact: LI Yanhui

摘要:

采用双频激光器产生的两个频率的脉冲激光作为载波,结合微波信号处理技术,进行目标距离和速度的探测.导出了探测信噪比与激光传输距离之间的关系,分析了双频激光脉冲宽度对多普勒探测的影响.应用微波提取差频信号的方法,对脉冲带宽和多普勒差频值之间进行了比较,分析了脉冲带宽可以包含多个多普勒门和脉冲带宽小于多普勒差频这两种情况下探测多普勒信号的方法.

关键词: 光载微波激光雷达, 多普勒效应, 双频激光器, 差频

Abstract:

A method for measuring the range and velocity of the target is proposed based on the pulsed two-frequency laser, and the lidar-radar system concept is introduced. By analyzing the electrical power signal-to nose ratio (SNR), the relation between detection range and pulsewidth is obtained. Then the Doppler detection of the laser pulse bandwidth containing many Doppler gates and the laser pulse bandwidth less than the beat frequency is given.

Key words: lidar-radar, Doppler effect, two-frequency laser, beat frequency

中图分类号: 

  • TN 249