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Open AccessArticle

A Basic Complete Numerical Toolbox for Picosecond Ultrasonics

Spectrum Engineering Department, French National Frequency Agency, ANFR/DPSAI/IS, CS 13829, 29238 Brest CEDEX 03, France
Acoustics 2019, 1(1), 137-155; https://doi.org/10.3390/acoustics1010010
Received: 27 November 2018 / Revised: 9 January 2019 / Accepted: 13 January 2019 / Published: 17 January 2019
A complete numerical complete toolbox is proposed concerning the simulation of photo-induced propagative mechanical wave, and concerning the optical reflectometric measured response of the material, which is initially exposed to a first pump laser beam that photo-induces the acoustic wavefronts. The deformation field and its propagation into a bulk material are simulated. Based on this field expression, the complex transient reflectivity is given for a medium considered as homogeneous. The real part of this quantity permits afterwards to propose a numerical simulation of the transient reflectivity, which corresponds to the optical signal measured during experimental works. The frequency acoustic spectrum is simulated and successfully compared to the measured frequency spectrum. For the first time, numerical complete developments are explicitly proposed and fully-developed under the SciLab ® environment, related to the simulation of laser-induced picosecond acoustic wavefront photogenerated through an opto-acoustic transduction process (ultrasonics and pretersonics). View Full-Text
Keywords: simulation; computational acoustics; laser ultrasonics; optical reflectivity; acoustic waves; pretersonics simulation; computational acoustics; laser ultrasonics; optical reflectivity; acoustic waves; pretersonics
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Babilotte, P. A Basic Complete Numerical Toolbox for Picosecond Ultrasonics. Acoustics 2019, 1, 137-155.

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