Time-resolved photoacoustic Doppler characterization of flow using pulsed excitation

Adi Sheinfeld*, Sharon Gilead, Avishay Eyal

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


A new approach for implementing pulsed excitation enables time-resolved characterization of flow, using the photoacoustic Doppler effect. The method yields two-dimensional maps of the Doppler shift vs. axial position of flowing absorbing particles. It takes advantage of the unique flexibility and accuracy of external modulation which offers excellent control over the parameters of the pulsed optical excitation. The experimental setup comprised a CW tunable laser source operating in the fiber optic communications band (1510-1620nm) followed by an electro-optic modulator, electronically driven by an arbitrary waveform generator. Using the technique the flow of a suspension of carbon particles in a C-flex tube was measured over a wide range of velocities from 18 mm/sec up to 200mm/sec.

Original languageEnglish
Title of host publicationPhotons Plus Ultrasound
Subtitle of host publicationImaging and Sensing 2010
StatePublished - 2010
EventPhotons Plus Ultrasound: Imaging and Sensing 2010 - San Francisco, CA, United States
Duration: 24 Jan 201026 Jan 2010

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


ConferencePhotons Plus Ultrasound: Imaging and Sensing 2010
Country/TerritoryUnited States
CitySan Francisco, CA


  • Doppler
  • External modulation
  • Flow measurement
  • Photoacoustic imaging


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