Laser Doppler two-dimensional velocity measurement using optical quadrature detection

Koichi Maru; Ryota Sato; Yoko Kamioka

doi:10.1117/1.OE.54.12.124101

9 December 2015 Laser Doppler two-dimensional velocity measurement using optical quadrature detection

Koichi Maru, Ryota Sato, Yoko Kamioka

Author Affiliations +

Optical Engineering, Vol. 54, Issue 12, 124101 (December 2015). https://doi.org/10.1117/1.OE.54.12.124101

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.

Citation Download Citation

Koichi Maru, Ryota Sato, and Yoko Kamioka "Laser Doppler two-dimensional velocity measurement using optical quadrature detection," Optical Engineering 54(12), 124101 (9 December 2015). https://doi.org/10.1117/1.OE.54.12.124101

Published: 9 December 2015

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