期刊
OPTICS LETTERS
卷 35, 期 8, 页码 1200-1202出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.35.001200
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- National Institutes of Health (NIH) [EB007619-01A1]
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 mu 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. (C) 2010 Optical Society of America
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