Direct distributed velocity sensing using a low-coherence interferometer

Yoh Imai; Kazuhiro Tanaka

doi:10.1117/12.347775

7 May 1999 Direct distributed velocity sensing using a low-coherence interferometer

Yoh Imai, Kazuhiro Tanaka

Proceedings Volume 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99); (1999) https://doi.org/10.1117/12.347775
Event: Optical Engineering for Sensing and Nanotechnology (ICOSN '99), 1999, Yokohama, Japan

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.

Citation Download Citation

Yoh Imai and Kazuhiro Tanaka "Direct distributed velocity sensing using a low-coherence interferometer", Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); https://doi.org/10.1117/12.347775

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