24-fold noise reduction in resonator-based optical detection of ultrasound via phase monitoring (Conference Presentation)

Lucas Riobó, Yoav Hazan, Amir Rosenthal

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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 languageEnglish
Title of host publicationPhotons Plus Ultrasound: Imaging and Sensing 2020
EditorsAlexander A. Oraevsky, Lihong V. Wang
Pages112400T
Volume11240
DOIs
StatePublished - 2020
EventSPIE Photonics West 2020 - San Francisco, United States
Duration: 2 Feb 20205 Feb 2020
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11240.toc#FrontMatterVolume11240

Conference

ConferenceSPIE Photonics West 2020
Country/TerritoryUnited States
CitySan Francisco
Period2/02/205/02/20
Internet address

Keywords

  • Interferometry
  • Optical resonators
  • Phase detection
  • Ultrasound

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