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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 10 — May. 15, 2007
  • pp: 1247–1249

Low-coherence self-referencing velocimetry

Andreas Kempe, Stefan Schlamp, and Thomas Rösgen  »View Author Affiliations

Optics Letters, Vol. 32, Issue 10, pp. 1247-1249 (2007)

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Low-coherence self-referencing velocimetry optically measures the relative velocity between a point in a particle-laden fluid and a (potentially moving) reference surface. Low-coherence light scattered off the particles and off the reference surface is coupled into an interferometer with variable optical delay in one arm and an acousto-optical modulator in the second arm. The measurement location is set relative to the reference surface. Its location can be scanned along a line by adjusting the optical delay in the interferometer. The spatial resolution is typically tens of micrometers. Only one low-coherence light beam is required for each component of the velocity vector. Proof-of-principle measurements in Taylor–Couette flow are presented.

© 2007 Optical Society of America

OCIS Codes
(000.2170) General : Equipment and techniques
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
(280.3340) Remote sensing and sensors : Laser Doppler velocimetry
(300.6310) Spectroscopy : Spectroscopy, heterodyne

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: December 20, 2006
Revised Manuscript: February 2, 2007
Manuscript Accepted: February 13, 2007
Published: April 17, 2007

Andreas Kempe, Stefan Schlamp, and Thomas Rösgen, "Low-coherence self-referencing velocimetry," Opt. Lett. 32, 1247-1249 (2007)

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