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Proceedings Paper

Ultrasound-modulated optical tomography using four-wave mixing in photorefractive polymers
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Paper Abstract

Ultrasound-modulated optical tomography uses a well focused ultrasound beam to modulate diffuse light inside soft biological tissues. This modality combines the advantages of ultrasound resolution with optical contrast. However, because of the low ultrasound modulation efficiency, the large background of un-modulated photons gives a low signal-to-noise ratio. Here we report a technique for detection of ultrasound-modulated light using a phase conjugated signal generated by four-wave mixing in a photorefractive polymer. The experimental results demonstrate the potential of this method to detect ultrasound-modulated optical signals in a highly scattering media with an excellent signal-to-noise ratio.

Paper Details

Date Published: 28 February 2008
PDF: 8 pages
Proc. SPIE 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 68561S (28 February 2008); doi: 10.1117/12.764987
Show Author Affiliations
Huiliang Zhang, Texas A&M Univ. (United States)
Philip Hemmer, Texas A&M Univ. (United States)
Peng Wang, Nitto Denko Technical Corp. (United States)
Shuji Rokutanda, Nitto Denko Technical Corp. (United States)
Michiharu Yamamoto, Nitto Denko Technical Corp. (United States)
Lihong V. Wang, Washington Univ. in St. Louis (United States)


Published in SPIE Proceedings Vol. 6856:
Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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