OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 19 — Jul. 1, 2005
  • pp: 4041–4048

Imaging in diffuse media with pulsed-ultrasound-modulated light and the photorefractive effect

Lei Sui, Ronald A. Roy, Charles A. DiMarzio, and Todd W. Murray  »View Author Affiliations


Applied Optics, Vol. 44, Issue 19, pp. 4041-4048 (2005)
http://dx.doi.org/10.1364/AO.44.004041


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Abstract

Acousto-optic imaging in diffuse media is a dual wave-sensing technique in which an acoustic field interacts with multiply scattered laser light. The acoustic field causes a phase modulation in the optical field emanating from the interaction region, and this phase-modulated optical field carries with it information about the local optomechanical properties of the media. We report on the use of a pulsed ultrasound transducer to modulate the optical field and the use of a photorefractive-crystal-based interferometry system to detect ultrasound-modulated light. The use of short pulses of focused ultrasound allows for a one-dimensional acousto-optic image to be obtained along the transducer axis from a single, time-averaged acousto-optic signal. The axial and lateral resolutions of the system are controlled by the spatial pulse length and width of the ultrasound beam, respectively. In addition, scanning the ultrasound transducer in one dimension yields two-dimensional images of optical inhomogeneities buried in turbid media.

© 2005 Optical Society of America

OCIS Codes
(110.7050) Imaging systems : Turbid media
(110.7170) Imaging systems : Ultrasound
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(170.3880) Medical optics and biotechnology : Medical and biological imaging

History
Original Manuscript: September 29, 2004
Revised Manuscript: January 19, 2005
Manuscript Accepted: January 29, 2005
Published: July 1, 2005

Citation
Lei Sui, Ronald A. Roy, Charles A. DiMarzio, and Todd W. Murray, "Imaging in diffuse media with pulsed-ultrasound-modulated light and the photorefractive effect," Appl. Opt. 44, 4041-4048 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-19-4041


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