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20 April 2010 Simulation of a novel ultrasound generator-receiver on a single optical fiber
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A novel ultrasound generator-receiver built on a single-mode optical fiber using a layer of gold nanoparticles has been designed. The generator takes advantage of the optical and photo-acoustic properties of gold nanoparticles. Thermal and pressure waves are generated in the nano-particle layer when it is exposed to high intensity, short duration laser radiation. The laser radiation is applied in an intensity range that creates an instantaneous surface heating of the layer material that, in turn, drives a pressure wave into the layer. The pressure wave interacts with the layer-substrate interface to create stress distributions of varying strengths and qualities, depending on the intensity and duration of the initial laser pulse. The radiation due to laser-induced heating on the nano-particles was investigated using FEA analyses. The maximum principal stress distribution was investigated by the FEA. Results indicate that the ultrasound generation elements have almost zero effect on the diaphragm.
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Xingwei Wang, Chunyang Liu, Nan Wu, Wenhui Wang, Charles Guthy, Ye Tian, and Chengyu Cao "Simulation of a novel ultrasound generator-receiver on a single optical fiber", Proc. SPIE 7677, Fiber Optic Sensors and Applications VII, 76770Y (20 April 2010);

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