Publication Details

Control of Broadband Optically Generated Ultrasound Pulses Using Binary Amplitude Holograms

BROWN, M.; JAROŠ, J.; COX, B.; TREEBY, B. Control of Broadband Optically Generated Ultrasound Pulses Using Binary Amplitude Holograms. Journal of the Acoustical Society of America, 2016, vol. 139, no. 4, p. 1637-1647. ISSN: 1520-8524.
Czech title
Generování ultrazvuku pomocí laseru
Type
journal article
Language
English
Authors
Brown Michael (FIT)
Jaroš Jiří, doc. Ing., Ph.D. (DCSY)
Cox Ben (FIT)
Treeby Bradley
URL
Keywords

ultrasound, photoacoustic , spectral methods, k-Wave

Abstract

In this work, the use of binary amplitude holography is investigated as a mechanism to focus broadband acoustic pulses generated by high peak-power pulsed lasers. Two algorithms are described for the calculation of the binary holograms; one using ray-tracing, and one using an optimization based on direct binary search. It is shown using numerical simulations that when a binary amplitude hologram is excited by a train of laser pulses at its design frequency, the acoustic field can be focused at a pre-determined distribution of points, including single and multiple focal points, and line and square foci. The numerical results are validated by acoustic field measurements from binary amplitude holograms, excited by a high peak-power laser.

Published
2016
Pages
1637–1647
Journal
Journal of the Acoustical Society of America, vol. 139, no. 4, ISSN 1520-8524
DOI
UT WoS
000374974900017
EID Scopus
BibTeX
@article{BUT130915,
  author="Michael {Brown} and Jiří {Jaroš} and Ben {Cox} and Bradley {Treeby}",
  title="Control of Broadband Optically Generated Ultrasound Pulses Using Binary Amplitude Holograms",
  journal="Journal of the Acoustical Society of America",
  year="2016",
  volume="139",
  number="4",
  pages="1637--1647",
  doi="10.1121/1.4944758",
  issn="1520-8524",
  url="http://scitation.aip.org/content/asa/journal/jasa/139/4/10.1121/1.4944758"
}
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