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Proceedings Paper

24-fold noise reduction in resonator-based optical detection of ultrasound via phase monitoring (Conference Presentation)
Author(s): Lucas Riobó; Yoav Hazan; Amir Rosenthal

Paper Abstract

The detection of ultrasound via optical resonators is conventionally performed by tuning a continuous-wave (CW) laser to the linear slope of the resonance and monitoring the intensity modulation at the resonator output. In this work, we develop an alternative CW technique that can significantly reduce the measurement noise by monitoring variations in the phase, rather than intensity, at the resonator output. In our current implementation, which is based on a balanced Mach-Zehnder interferometer for phase detection, we demonstrate a 24-fold increase in the signal-to-noise ratio of the detected ultrasound signal over the conventional, intensity-monitoring approach.

Paper Details

Date Published: 20 April 2020
Proc. SPIE 11240, Photons Plus Ultrasound: Imaging and Sensing 2020, 112400T (20 April 2020); doi: 10.1117/12.2542010
Show Author Affiliations
Lucas Riobó, Technion-Israel Institute of Technology (Israel)
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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