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.
Original language | English |
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Title of host publication | Photons Plus Ultrasound: Imaging and Sensing 2020 |
Editors | Alexander A. Oraevsky, Lihong V. Wang |
Pages | 112400T |
Volume | 11240 |
DOIs | |
State | Published - 2020 |
Event | SPIE Photonics West 2020 - San Francisco, United States Duration: 2 Feb 2020 → 5 Feb 2020 https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11240.toc#FrontMatterVolume11240 |
Conference
Conference | SPIE Photonics West 2020 |
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Country/Territory | United States |
City | San Francisco |
Period | 2/02/20 → 5/02/20 |
Internet address |
Keywords
- Interferometry
- Optical resonators
- Phase detection
- Ultrasound