ForschungPublikationen
All-optical focused ultrasound detector for intravascular applications

All-optical focused ultrasound detector for intravascular applications

Kategorien Konferenz (reviewed)
Jahr 2021
Autoren Nagli, M.; Koch, J.; Hazan, Y.; Volodarsky, O.; Kumar, R. R.; Levi, A.; Hahamovich, E.; Overmeyer, L.; Rosenthal, A.
Veröffentlicht in Proc. SPIE 11642, Photons Plus Ultrasound: Imaging and Sensing 2021, 116421U
Beschreibung

One of the main challenges in intravascular photoacoustic (IVPA) imaging is the limited sensitivity and bandwidth of miniaturized piezoelectric probes. Optical detectors of ultrasound can drastically improve both these features, but often lack acoustic focusing. In this work, we developed a focused ultrasound detector by integrating a miniaturized acoustic lens, made out of glass, with a silicon-photonics-based detector. A detection bandwidth of up to 80 MHz and lateral resolution beyond 50 µm was demonstrated with a lens diameter of 0.8 mm. Our device is transparent in the near-infrared window, simplifying its integration in a miniaturized IVPA probe.

DOI 10.1117/12.2577228