Effect of speckle pattern on laser Doppler velocimeters

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

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)


The effect of speckle pattern on laser Doppler velocimeters is studied theoretically and experimentally. We have found that dynamic speckle patterns can cause error in velocity measurement. Increasing sampling time and using proper signal processing circuits can eliminate the bad effect caused by speckle pattern. The accuracy of velocity measurement is better than 2.1% in a wide velocity range (4.66-468.86 mm/s) when speckle effects are taken into account.

Original languageEnglish
Pages (from-to)522-525
Number of pages4
JournalChinese Optics Letters
Issue number9
Publication statusPublished - Sept 2004

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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