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Proceedings Paper

Direct distributed velocity sensing using a low-coherence interferometer
Author(s): Yoh Imai; Kazuhiro Tanaka
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Paper Abstract

A new distributed sensing method for measuring directly the flow velocity by using low coherence interference techniques is proposed and demonstrated. In the present method, temporally fluctuated signal, not the Doppler frequency shift, is detected. Theoretical analysis shows that the spectrum of backscattered light from the particle takes a Gaussian form whose width is simply proportional to the flow velocity. The accuracy for adjusting the depth position is approximately 34 micrometer which is determined by a coherence length of a light source.

Paper Details

Date Published: 7 May 1999
PDF: 4 pages
Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); doi: 10.1117/12.347775
Show Author Affiliations
Yoh Imai, Kyushu Institute of Technology (Japan)
Kazuhiro Tanaka, Kyushu Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 3740:
Optical Engineering for Sensing and Nanotechnology (ICOSN '99)
Ichirou Yamaguchi, Editor(s)

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