Open AccessCompact system for in situ laser Doppler velocimetry of blood flow
Author(s) -
Elise Bou,
Aliou Ly,
Julien Roul,
Olivier Llopis,
Christophe Vieu,
Aline Cerf
Publication year - 2019
Publication title -
biomedical optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.362
H-Index - 86
ISSN - 2156-7085
DOI - 10.1364/boe.10.005862
Subject(s) - laser doppler velocimetry , velocimetry , optics , photodiode , doppler effect , fluidics , laser doppler vibrometer , optical fiber , materials science , flow velocity , blood flow , signal (programming language) , particle image velocimetry , flow measurement , spectrum analyzer , radius of curvature , laser , flow (mathematics) , physics , curvature , computer science , distributed feedback laser , turbulence , aerospace engineering , mechanics , engineering , medicine , thermodynamics , programming language , astronomy , mathematics , mean curvature , mean curvature flow , geometry
This work describes the implementation of a compact system allowing measurement of blood flow velocity using laser Doppler velocimetry in situ . The compact setup uses an optical fiber acting as an emitter and receptor of the signal. The signal is then recovered by a photodiode and processed using a spectrum analyzer. The prototype was successfully tested to measure microbead suspension and whole blood flow velocities in a fluidic chip. Fibers with hemispherical lenses with three different radius of curvature were investigated. This simple yet precise setup would enable the insertion of the fiber via a medical catheter to monitor blood flow velocity in non superficial vessels where previous reported techniques cannot be implemented.