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