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Optical Engineering

Nonmechanical cross-sectional scanning laser Doppler velocimeter with directional discrimination of transverse velocity component
Author(s): Koichi Maru; Takahiro Hata
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Paper Abstract

We propose a nonmechanical cross-sectional scanning laser Doppler velocimeter (LDV) with directional discrimination of the transverse velocity component. In the proposed LDV, a combination of changes in wavelength and the port of the fiber array between the main body and probe are used to scan the measurement position on a two-dimensional (2-D) cross-sectional plane that is perpendicular to the direction of flow. Optical frequency shifting using acousto-optic modulators (AOMs) is employed to discriminate the direction of the transverse velocity component. Polarization multiplexing is used to transmit frequency-shifted beams from the main body to the probe. The experimental results reveal that the 2-D scanning function and introduction of directional sensitivity are successfully achieved.

Paper Details

Date Published: 2 January 2015
PDF: 6 pages
Opt. Eng. 54(1) 017102 doi: 10.1117/1.OE.54.1.017102
Published in: Optical Engineering Volume 54, Issue 1
Show Author Affiliations
Koichi Maru, Kagawa Univ. (Japan)
Takahiro Hata, Kagawa Univ. (Japan)


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