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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 20 — Jul. 10, 2008
  • pp: 3619–3630

Modeling of nonphase mechanisms in ultrasonic modulation of light propagation

Quan Liu, Stephen Norton, and Tuan Vo-Dinh  »View Author Affiliations


Applied Optics, Vol. 47, Issue 20, pp. 3619-3630 (2008)
http://dx.doi.org/10.1364/AO.47.003619


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Abstract

While phase variation due to ultrasonic modulation of coherent light has been extensively studied in acousto-optical imaging, fewer groups have studied nonphase mechanisms of ultrasonic modulation, which may be important in exploring ultrasonic modulation of incoherent light for imaging. We have developed a versatile Monte Carlo based method that can model not only phase variation due to refractive index changes and scatterer displacement in tissue or tissue-like phantoms, but also amplitude and exit location variations due to the changes in optical properties and refractive index under ultrasonic modulation, in which the exit location variation has not, to the best of our knowledge, been modeled previously. Our results show that the modulation depth due to the exit location variation is three orders of magnitude higher than that due to amplitude variation, but two to three orders of magnitude lower than that due to phase variation for monochromatic light. Furthermore it is found that the modulation depth in reflectance due to the exit location variation is larger than that in transmittance for small source-detector separations.

© 2008 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(110.7170) Imaging systems : Ultrasound
(170.3660) Medical optics and biotechnology : Light propagation in tissues
(290.1350) Scattering : Backscattering
(290.4210) Scattering : Multiple scattering
(290.7050) Scattering : Turbid media

ToC Category:
Scattering

History
Original Manuscript: September 13, 2007
Revised Manuscript: June 5, 2008
Manuscript Accepted: June 6, 2008
Published: July 7, 2008

Virtual Issues
Vol. 3, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Quan Liu, Stephen Norton, and Tuan Vo-Dinh, "Modeling of nonphase mechanisms in ultrasonic modulation of light propagation," Appl. Opt. 47, 3619-3630 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-20-3619

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