25 April 2005 Analytical model for modulation of diffuse light by pulsed ultrasonic waves
Author Affiliations +
Abstract
We present an analytical solution for the acousto-optical modulation of multiply scattered light in a medium irradiated with a train of ultrasound pulses. Previous theory is extended to cases where the ultrasound induced optical phase increments between the different scattering events are strongly correlated. The relation between the ultrasound induced motions of the fluid and the optical scatterers is generalized, and it is shown that correlation exists between the optical phase increments that are due to the scatterer movement and to the modulation of the optical index of refraction. Finally, it is shown that compared with the spectrum of the ultrasound pulses, the power spectral density of the acousto-optically modulated light is strongly attenuated toward the higher ultrasound frequencies.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sava Sakadzic, Lihong V. Wang, "Analytical model for modulation of diffuse light by pulsed ultrasonic waves", Proc. SPIE 5697, Photons Plus Ultrasound: Imaging and Sensing 2005: The Sixth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, (25 April 2005); doi: 10.1117/12.589432; https://doi.org/10.1117/12.589432
PROCEEDINGS
11 PAGES


SHARE
Back to Top