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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 8 — Apr. 15, 2010
  • pp: 1200–1202

Photoacoustic correlation spectroscopy and its application to low-speed flow measurement

Sung-Liang Chen, Tao Ling, Sheng-Wen Huang, Hyoung Won Baac, and L. Jay Guo  »View Author Affiliations


Optics Letters, Vol. 35, Issue 8, pp. 1200-1202 (2010)
http://dx.doi.org/10.1364/OL.35.001200


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Abstract

A photoacoustic correlation technique, inspired by its optical counterpart—the fluorescence correlation spectroscopy (FCS)—was tested for the first time, to our knowledge, to demonstrate the feasibility of low-speed flow measurement based on photoacoustic signal detection. A pulsed laser was used to probe the flow of light-absorbing beads. A photoacoustic correlation system of 0.8 s temporal resolution was built and flow speeds ranging from 249 to 14.9 μ m / s with corresponding flow times from 4.42 to 74.1 s were measured. The experiment serves as a proof of concept for photoacoustic correlation spectroscopy, which may have many potential applications similar to the FCS.

© 2010 Optical Society of America

OCIS Codes
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
(170.5120) Medical optics and biotechnology : Photoacoustic imaging

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: January 5, 2010
Manuscript Accepted: February 25, 2010
Published: April 14, 2010

Virtual Issues
Vol. 5, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Sung-Liang Chen, Tao Ling, Sheng-Wen Huang, Hyoung Won Baac, and L. Jay Guo, "Photoacoustic correlation spectroscopy and its application to low-speed flow measurement," Opt. Lett. 35, 1200-1202 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-8-1200

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