| Original Articles |
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New Laser Doppler Velocimetry with Wide Dynamic Range and Clear Directional Discrimination |
| GUI Hua-Qiao;Lü Liang;HE De-Yong;XU Jun; XIE Jian-Ping;ZHAO Tian-Peng;WANG An-Ting; MING Hai |
| Department of Physics, University of Science and Technology of China, Hefei 230026 |
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| Cite this article: |
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GUI Hua-Qiao, Lü Liang, HE De-Yong et al 2005 Chin. Phys. Lett. 22 1344-1346 |
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Abstract We present a new laser Doppler velocimetry based on self-mixing effect using a single longitudinal-mode vertical-cavity surface-emitting laser modulated by a dynamic triangular current. It can indicate the direction of velocity without ambiguity in a wide dynamic range of 5.2--479.9mm/s. The accuracy of velocity measurement is better than 3.1% in the whole velocity range when a diffusing target is used for measurements. More interestingly, it works very well on different diffusing surfaces, even on a black glossy photographic paper.
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| Keywords:
07.07.Df
42.55.Px
42.79.Qx
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Published: 01 June 2005
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| PACS: |
07.07.Df
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(Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)
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42.55.Px
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(Semiconductor lasers; laser diodes)
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42.79.Qx
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(Range finders, remote sensing devices; laser Doppler velocimeters, SAR, And LIDAR)
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