Nonmechanical cross-sectional scanning laser Doppler velocimeter with directional discrimination of transverse velocity component

Koichi Maru; Takahiro Hata

doi:10.1117/1.OE.54.1.017102

2 January 2015 Nonmechanical cross-sectional scanning laser Doppler velocimeter with directional discrimination of transverse velocity component

Koichi Maru, Takahiro Hata

Author Affiliations +

Optical Engineering, Vol. 54, Issue 1, 017102 (January 2015). https://doi.org/10.1117/1.OE.54.1.017102

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.

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Koichi Maru and Takahiro Hata "Nonmechanical cross-sectional scanning laser Doppler velocimeter with directional discrimination of transverse velocity component," Optical Engineering 54(1), 017102 (2 January 2015). https://doi.org/10.1117/1.OE.54.1.017102

Published: 2 January 2015

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