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Optical Engineering

Laser Doppler two-dimensional velocity measurement using optical quadrature detection
Author(s): Koichi Maru; Ryota Sato; Yoko Kamioka
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Paper Abstract

A laser Doppler velocimeter (LDV) for measuring two-dimensional components of velocity vectors based on optical quadrature detection is presented. The LDV uses a simple structure without frequency shifting or multiple wavelengths. In this LDV, the scattered light is monitored in different directions with two detection blocks. In each block, two PDs are used and a 90-deg phase shift is applied to one of the reference beams to detect the absolute value and sign of the beat frequency. We performed an experiment for measuring two-dimensional velocity vectors using a setup introducing orthogonal polarized beams for optical quadrature detection. The experimental results indicate that two-dimensional velocity vectors can be successfully estimated using the proposed method.

Paper Details

Date Published: 9 December 2015
PDF: 6 pages
Opt. Eng. 54(12) 124101 doi: 10.1117/1.OE.54.12.124101
Published in: Optical Engineering Volume 54, Issue 12
Show Author Affiliations
Koichi Maru, Kagawa Univ. (Japan)
Ryota Sato, Kagawa Univ. (Japan)
Yoko Kamioka, Kagawa Univ. (Japan)

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