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Proceedings Paper

Simultaneous multi-channel ultrasound detection via optical phase modulated pulse interferometry (Conference Presentation)
Author(s): Yoav Hazan; Amir Rosenthal

Paper Abstract

In optical detection of ultrasound, resonators with high Q-factors are frequently used to maximize sensitivity. However, in order to perform parallel interrogation, conventional interferometric techniques require an overlap between the resonator spectra, which is difficult to achieve with high Q-factor resonators. In this work, a new method is developed for simultaneous interrogation of optical resonators with non-overlapping spectra. The method is based on a phase modulation scheme for pulse interferometry (PM-PI) and requires only a single photodetector and sampling channel per ultrasound detector. Using PM-PI, parallel ultrasound detection is demonstrated with four high Q-factor resonators.

Paper Details

Date Published: 20 April 2020
Proc. SPIE 11240, Photons Plus Ultrasound: Imaging and Sensing 2020, 112400W (20 April 2020); doi: 10.1117/12.2541735
Show Author Affiliations
Yoav Hazan, Technion-Israel Institute of Technology (Israel)
Amir Rosenthal, Technion-Israel Institute of Technology (Israel)

Published in SPIE Proceedings Vol. 11240:
Photons Plus Ultrasound: Imaging and Sensing 2020
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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