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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 5, Iss. 12 — Sep. 30, 2010

Parallel detection of amplitude-modulated, ultrasound-modulated optical signals

Rui Li, Lipei Song, Daniel S. Elson, and Meng-Xing Tang  »View Author Affiliations


Optics Letters, Vol. 35, Issue 15, pp. 2633-2635 (2010)
http://dx.doi.org/10.1364/OL.35.002633


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Abstract

We investigated the effect of amplitude-modulated (AM) ultrasound (US) on acousto-optic (AO) signals. A phantom was exposed to both AM US and a green laser, and CCD measurements of speckle contrast were made with various exposure times. The results show that the AO signal oscillates at the AM frequency when the CCD exposure time is a fraction of the AM period and stops oscillating when the CCD exposure time is a multiple of the AM period. The AO signal decreases quickly as the AM frequency increases or peak–peak (pk–pk) amplitude decreases. With 4 ms exposure time, 250 Hz AM frequency and 1.27 MPa pk–pk acoustic pressure, there is an ~30% increase in the AO signal compared with that of CW US. The increase in the signal is likely to be due to the particle oscillation and the induced shear wave as a result of the radiation force generated by the AM US.

© 2010 Optical Society of America

OCIS Codes
(170.7170) Medical optics and biotechnology : Ultrasound
(170.1065) Medical optics and biotechnology : Acousto-optics

ToC Category:
Imaging Systems

History
Original Manuscript: March 19, 2010
Revised Manuscript: June 21, 2010
Manuscript Accepted: June 28, 2010
Published: July 29, 2010

Virtual Issues
Vol. 5, Iss. 12 Virtual Journal for Biomedical Optics

Citation
Rui Li, Lipei Song, Daniel S. Elson, and Meng-Xing Tang, "Parallel detection of amplitude-modulated, ultrasound-modulated optical signals," Opt. Lett. 35, 2633-2635 (2010)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-35-15-2633


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