Publication Details
Control of Broadband Optically Generated Ultrasound Pulses Using Binary Amplitude Holograms
ultrasound, photoacoustic , spectral methods, k-Wave
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.
@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"
}