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AOM and lock-in amplifier lidar-radar system for distance measurement

  • Li Lei*
  • , Yang Suhui
  • , Sun Xinpeng
  • , Gao Lan
  • , Tao Liping
  • , Zhao Changming
  • *Corresponding author for this work
  • Beijing Institute of Technology

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The lidar-radar architecture has been developed and used in detection and identification of targets in many domains. Based on the single frequency monothilic NPRO (Nonplanar Ring Oscillator) and AOM (Acouslo-Oplical Modulator), a lidar-radar conceptive system for distance measurement has been constructed and investigated. The system consists of mainly three parts: the beat frequency laser source made up of NPRO and AOM, the transmitting and reflection collecting system and the lock-in amplifier signal processing unit. Then the distance measurement has been demonstrated using a 700-meter long single-mode fiber. In order to calculate unambiguously the actual distance, two synthetic frequencies have been introduced in turn. At last, using the lidar-radar setup, the displacement and velocity of a moving target which is mounted on a precise motorized optical bench have been displayed.

Original languageEnglish
Title of host publicationAdvanced Laser Technologies 2005
DOIs
Publication statusPublished - 2006
EventAdvanced Laser Technologies 2005 - Tianjin, China
Duration: 3 Sept 20056 Sept 2005

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6344 II
ISSN (Print)0277-786X

Conference

ConferenceAdvanced Laser Technologies 2005
Country/TerritoryChina
CityTianjin
Period3/09/056/09/05

Keywords

  • AOM
  • Distance measurement
  • Lidar-radar
  • Lock-in amplifier

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