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Helmholtz Center Munich Reports Findings in Vibration and Acoustics (Characterization of the spatio-temporal response of optical fiber sensors to...

August 5, 2014



Helmholtz Center Munich Reports Findings in Vibration and Acoustics (Characterization of the spatio-temporal response of optical fiber sensors to incident spherical waves)

By a News Reporter-Staff News Editor at Journal of Technology -- Current study results on Vibration and Acoustics have been published. According to news originating from Neuherberg, Germany, by VerticalNews correspondents, research stated, "In this study a theoretical framework for calculating the acoustic response of optical fiber-based ultrasound sensors is presented. The acoustic response is evaluated for optical fibers with several layers of coating assuming a harmonic point source with arbitrary position and frequency."

Our news journalists obtained a quote from the research from Helmholtz Center Munich, "First, the fiber is acoustically modeled by a layered cylinder on which spherical waves are impinged. The scattering of the acoustic waves is calculated analytically and used to find the normal components of the strains on the fiber axis. Then, a strain-optic model is used to calculate the phase shift experienced by the guided mode in the fiber owing to the induced strains. The framework is showcased for a silica fiber with two layers of coating for frequencies in the megahertz regime, commonly used in medical imaging applications."

According to the news editors, the research concluded: "The theoretical results are compared to experimental data obtained with a sensing element based on a pi-phase-shifted fiber Bragg grating and with photoacoustically generated ultrasonic signals."

For more information on this research see: Characterization of the spatio-temporal response of optical fiber sensors to incident spherical waves. Journal of the Acoustical Society of America, 2014;135(4):1853-1862. Journal of the Acoustical Society of America can be contacted at: Acoustical Soc Amer Amer Inst Physics, Ste 1 No 1, 2 Huntington Quadrangle, Melville, NY 11747-4502, USA. (Acoustical Society of America - acousticalsociety.org/; Journal of the Acoustical Society of America - asadl.org/jasa/)

The news correspondents report that additional information may be obtained from I.A. Veres, Helmholtz Center Munich, D-85764 Neuherberg, Germany. Additional authors for this research include P. Burgholzer, T. Berer, A. Rosenthal, G. Wissmeyer and V. Ntziachristos.

Keywords for this news article include: Europe, Germany, Neuherberg, Vibration and Acoustics

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Journal of Technology


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