Optical phase shifted pulse interferometry for parallel multi-channel ultrasound detection

Yoav Hazan; Amir Rosenthal

doi:10.1117/12.2526256

19 July 2019 Optical phase shifted pulse interferometry for parallel multi-channel ultrasound detection

Yoav Hazan, Amir Rosenthal

Proceedings Volume 11077, Opto-Acoustic Methods and Applications in Biophotonics IV; 110770I (2019) https://doi.org/10.1117/12.2526256
Event: European Conferences on Biomedical Optics, 2019, Munich, Germany

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.

Citation Download Citation

Yoav Hazan and Amir Rosenthal "Optical phase shifted pulse interferometry for parallel multi-channel ultrasound detection", Proc. SPIE 11077, Opto-Acoustic Methods and Applications in Biophotonics IV, 110770I (19 July 2019); https://doi.org/10.1117/12.2526256

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