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Proceedings Paper

All-optical highly sensitive broadband ultrasound sensor without any deformable parts for photoacoustic imaging
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Paper Abstract

We present a novel akinetic optical ultrasound sensor, consisting of a rigid, fiber-coupled Fabry-P´erot interferometer (FPI) with a central opening. The sensing principle relies exclusively on the detection of pressure-induced changes of the refractive index in the liquid located between the cavity mirrors. This enables resonance-free, inherently linear signal detection over a large bandwidth. We demonstrate that the sensor allows to realize exceedingly low noise equivalent pressure (NEP) values of 2 Pa over a 20 MHz measurement bandwidth, while maintaining a large full field of view of 2,7mm × 1,3mm as well as a flat frequency response. Imaging tests on phantoms and biological tissue show the suitability of the XARION-sensor for optical resolution photoacoustic microscopy (OR-PAM) applications. Transparent in axial direction, the sensor facilitates the implementation of highly sensitive fast-scanning reflection-mode OR-PAM setups, as well as easy integration with other imaging modalities such as confocal microscopy or OCT.

Paper Details

Date Published: 18 March 2016
PDF: 8 pages
Proc. SPIE 9708, Photons Plus Ultrasound: Imaging and Sensing 2016, 970815 (18 March 2016); doi: 10.1117/12.2213237
Show Author Affiliations
Wolfgang Rohringer, Medical Univ. of Vienna (Austria)
XARION Laser Acoustics GmbH (Austria)
Stefan Preißer, Medical Univ. of Vienna (Austria)
XARION Laser Acoustics GmbH (Austria)
Mengyang Liu, Medical Univ. of Vienna (Austria)
Stefan Zotter, XARION Laser Acoustics GmbH (Austria)
Zhe Chen, Medical Univ. of Vienna (Austria)
Boris Hermann, Medical Univ. of Vienna (Austria)
Harald Sattmann, Medical Univ. of Vienna (Austria)
Balthasar Fischer, XARION Laser Acoustics GmbH (Austria)
Wolfgang Drexler, Medical Univ. of Vienna (Austria)

Published in SPIE Proceedings Vol. 9708:
Photons Plus Ultrasound: Imaging and Sensing 2016
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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