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Proceedings Paper

New laser Doppler velocimetry using self-mixing effect in a vertical-cavity surface-emitting laser modulated by triangular current
Author(s): Huaqiao Gui; Liang Lv; Jun Xu; Deyong He; Feng Li; Anting Wang; Jianping Xie; Tianpeng Zhao; Hai Ming
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Paper Abstract

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.

Paper Details

Date Published: 17 January 2005
PDF: 6 pages
Proc. SPIE 5644, Optoelectronic Devices and Integration, (17 January 2005); doi: 10.1117/12.572226
Show Author Affiliations
Huaqiao Gui, Univ. of Science and Technology of China (China)
Liang Lv, Univ. of Science and Technology of China (China)
Jun Xu, Univ. of Science and Technology of China (China)
Deyong He, Univ. of Science and Technology of China (China)
Feng Li, Univ. of Science and Technology of China (China)
Anting Wang, Univ. of Science and Technology of China (China)
Jianping Xie, Univ. of Science and Technology of China (China)
Tianpeng Zhao, Univ. of Science and Technology of China (China)
Hai Ming, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 5644:
Optoelectronic Devices and Integration
Hai Ming; Xuping Zhang; Maggie Yihong Chen, Editor(s)

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