Multiphysics simulation to mitigate critical design challenges of a photoacoustic system

Uttam M. Pal

doi:10.1117/12.2645950

19 December 2022 Multiphysics simulation to mitigate critical design challenges of a photoacoustic system

Uttam M. Pal

Proceedings Volume 12320, Optics in Health Care and Biomedical Optics XII; 123201E (2022) https://doi.org/10.1117/12.2645950
Event: SPIE/COS Photonics Asia, 2022, Online Only

Abstract

With the advent of light-emitting diode (LED) increasingly used for Photoacoustic applications, it is imperative to mitigate the challenge of finding the most appropriate ultrasound transducer for a certain pulse excitation of the LED. The study aims to mitigate the challenge of finding the optimum operating frequency of the ultrasound required to detect the Photoacoustic signal while exciting the LED with a particular pulse input. The finite element method using COMSOL Multiphysics is implemented to perform a numerical model that fully couples electromagnetics, thermal, structural, mechanical, and acoustic physics. It is observed that as the pulse width of the LED excitation increases, the peak operating frequency of the ultrasound transducer also should increase. The operating frequency of the ultrasound transducer required for a particular pulse width of the excitation can be assessed using a finite element method approach.

Conference Presentation

Citation Download Citation

Uttam M. Pal "Multiphysics simulation to mitigate critical design challenges of a photoacoustic system", Proc. SPIE 12320, Optics in Health Care and Biomedical Optics XII, 123201E (19 December 2022); https://doi.org/10.1117/12.2645950

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