Push-pull analysis of photonic Doppler velocimetry measurements

A robust analysis method is presented for multiple-phase heterodyne velocimetry measurements. By combining information from three phase-shifted signals, it is possible to eliminate coherent intensity variations and incoherent light from the measurement. The three data signals are reduced to a pair o...

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Bibliographic Details
Published in:Review of scientific instruments 2007-07, Vol.78 (7), p.076102-076102-3
Main Authors: Dolan, D. H., Jones, S. C.
Format: Article
Language:English
Subjects:
Algorithms
Computer Simulation
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Laser-Doppler Flowmetry - instrumentation
Laser-Doppler Flowmetry - methods
Models, Theoretical
Photons
Reproducibility of Results
Sensitivity and Specificity
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Description
Summary:A robust analysis method is presented for multiple-phase heterodyne velocimetry measurements. By combining information from three phase-shifted signals, it is possible to eliminate coherent intensity variations and incoherent light from the measurement. The three data signals are reduced to a pair of quadrature signals, allowing unambiguous calculation of target displacement. The analysis relies on a minimum number of adjustable parameters, and these parameters can be precisely determined from simple interferometer characterization.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.2754405