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arXiv · 0904.0720

Semi-analytical model of acoustic-wave generation by a laser line pulse in an optically absorptive isotropic cylinder

D. Segur·A. L. Shuvalov·Y. Pan·B. Audoin
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Abstract

Semi-analytical model for calculating acoustic response to a line-focused laser pulse in an optically absorptive isotropic cylinder is proposed and implemented. It is assumed that the laser input is absorbed over the volume and thus creates a radially distributed thermoelastic source. Closed-form solution is obtained in the Fourier domain. Two inverse Fourier transforms in frequency and circumferential wave number yield the sought waveforms of acoustic response in the time-space domain. Numerical simulation is compared to the calculation based on a surface dipole source. The two signals have essentially different shapes of the wave-arrival peaks when the optical penetration is large enough.

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D. Segur, A. L. Shuvalov, Y. Pan, B. Audoin. 2009-04-04. Semi-analytical model of acoustic-wave generation by a laser line pulse in an optically absorptive isotropic cylinder. https://doi.org/10.1088/1742-6596/195/1/012007

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