New laser Doppler velocimetry using self-mixing effect in a vertical-cavity surface-emitting laser modulated by triangular current

Huaqiao Gui, Liang Lv, Jun Xu, Deyong He, Feng Li, Anting Wang, Jianping Xie, Tianpeng Zhao, Hai Ming

Research output: Journal article publicationConference articleAcademic researchpeer-review

1 Citation (Scopus)


A new, compact laser Doppler velocimetry is proposed, which is composed of a single-mode vertical-cavity surface-emitting laser modulated by a dynamical triangular current and a collimating lens. It can indicate the direction of velocity without ambiguity in the wide dynamic range of 5.2mm/s to 479.9mm/s when the sampling time is 0.1 second in the measurement. The accuracy of velocity measurement is better than 3.1% in the whole velocity range. What's more, this LDV works very well on different diffusing surfaces, even on a black glossy photographic paper.

Original languageEnglish
Article number34
Pages (from-to)199-204
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Issue numberPART 1
Publication statusPublished - 15 Jun 2005
Externally publishedYes
EventOptoelectronic Devices and Integration - Beijing, China
Duration: 8 Nov 200411 Nov 2004


  • Directional discrimination
  • Frequency modulation
  • Laser Doppler velocimetry
  • Self-mixing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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