Bonn 2025 – wissenschaftliches Programm
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K: Fachverband Kurzzeit- und angewandte Laserphysik
K 6: Poster
K 6.6: Poster
Dienstag, 11. März 2025, 14:00–16:00, Tent
Interferometric Visualization of High-Power Standing Ultrasound Fields — •Regina Schuster1, Murat-Jakub Ilhan1, Marius Foith1, Jan Helge Dörsam2, Christoph Haugwitz2, Class Hartmann2, Sören Soennecken2, Yannick Schrödel3,4, Christoph M. Heyl3,4, Mario Kupnik2, and Anne Harth1 — 1ZOT, AASAP, Aalen University, Aalen, Germany — 2TU Darmstadt, Darmstadt, Germany — 3DESY, Hamburg, Germany — 4Helmholtz Institute, Jena, Germany
The contactless and diffraction-based deflection of laser beams in air [1] requires the use of high-power standing ultrasound fields [2]. Consequently, a non-invasive and detailed characterisation of these intense sound fields is imperative.
In this work, we present a two-dimensional imaging technique for the interferometric visualisation of standing ultrasound fields. The modulation of air pressure induced by sound waves changes the refractive index of air, which can be quantitatively measured using an interferometer. This method enables the two-dimensional acquisition of complex sound field distributions generated by high-power ultrasound transducers in a single measurement.
[1] Y. Schrödel, et. al., Nature Photonics, vol. 18, no. 1, pp. 54-59,
2024
[2] A. Jäger, et. al., 2017 IEEE International Ultrasonics Symposium,
pp. 1-4, 2017
Keywords: sound field visualisation; interferometric measurements; high-power ultrasound fields