Simultaneous multi-channel ultrasound detection via optical phase modulated pulse interferometry (Conference Presentation)

Yoav Hazan; Amir Rosenthal

doi:10.1117/12.2541735

20 April 2020 Simultaneous multi-channel ultrasound detection via optical phase modulated pulse interferometry (Conference Presentation)

Yoav Hazan, Amir Rosenthal

Author Affiliations +

Proceedings Volume 11240, Photons Plus Ultrasound: Imaging and Sensing 2020; 112400W (2020) https://doi.org/10.1117/12.2541735
Event: SPIE BiOS, 2020, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

Yoav Hazan and Amir Rosenthal "Simultaneous multi-channel ultrasound detection via optical phase modulated pulse interferometry (Conference Presentation)", Proc. SPIE 11240, Photons Plus Ultrasound: Imaging and Sensing 2020, 112400W (20 April 2020); https://doi.org/10.1117/12.2541735

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KEYWORDS

Interferometry

Ultrasonography

Modulation

Resonators

Phase interferometry

Phase shift keying

Sensors

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