Detection of ultrasound-modulated photons in diffuse media using the photorefractive effect.
Ultrasound-modulated optical tomography is a dual-wave sensing technique in which diffusive light in a turbid medium interacts with an imposed acoustic field. A phase-modulated photon field emanates from the interaction region and carries with it information about the optomechanical properties of the medium. We present a technique for detection of ultrasound-induced optical phase modulation using an adaptive, photorefractive-crystal-based interferometry system. Experimental results are presented demonstrating detection of ultrasound-modulated signals in highly scattering media by use of pulsed ultrasound insonation.
Murray
Todd W
TW
Department of Aerospace and Mechanical Engineering, Boston University, Boston, Massachusetts 02215, USA.
Sui
Lei
L
Maguluri
Gopi
G
Roy
Ronald A
RA
Nieva
Alex
A
Blonigen
Florian
F
DiMarzio
Charles A
CA
D007089:Image Enhancement / Q000379:methods*; D007368:Interferometry / Q000379:methods*; D007834:Lasers; D017785:Photons; D012031:Refractometry / Q000295:instrumentation / Q000379:methods*; D041622:Tomography, Optical / Q000295:instrumentation / Q000379:methods*; D014463:Ultrasonography / Q000295:instrumentation / Q000379:methods*