Interrogation of Fabry-Pérot ultrasound sensors with Bessel beams

Oliver J. Sheppard; James A. Guggenheim; Dylan M Marques; Rehman Ansari; Edward Z Zhang; Paul C. Beard; Peter R. T. Munro

doi:10.1117/12.2551305

5 March 2020 Interrogation of Fabry-Pérot ultrasound sensors with Bessel beams

Oliver J. Sheppard, James A. Guggenheim, Dylan M Marques, Rehman Ansari, Edward Z Zhang, Paul C. Beard, Peter R. T. Munro

Author Affiliations +

Proceedings Volume 11240, Photons Plus Ultrasound: Imaging and Sensing 2020; 1124014 (2020) https://doi.org/10.1117/12.2551305
Event: SPIE BiOS, 2020, San Francisco, California, United States

Abstract

Fabry-Pérot etalon-based ultrasound detectors are typically interrogated with a focused Gaussian beam in order to achieve a desired acoustic element size. However, tightly focused Gaussian beams lead to beam ‘walk-off’ within the etalon cavity which reduces sensitivity. In previous work, the planar geometry of the Fabry-Pérot etalon has been replaced by a curved geometry matched to the interrogation beam geometry, thus preventing walk-off. In this work we instead propose using propagation invariant Bessel beams, thus matching the beam geometry to that of the planar etalon geometry, to reduce beam walk-off and increase sensitivity. Increased sensitivity may extend the imaging depth of Fabry-Pérot ultrasound detection systems and may thus enable photoacoustic imaging to access a range of deep tissue imaging applications.

Conference Presentation

Citation Download Citation

Oliver J. Sheppard, James A. Guggenheim, Dylan M Marques, Rehman Ansari, Edward Z Zhang, Paul C. Beard, and Peter R. T. Munro "Interrogation of Fabry-Pérot ultrasound sensors with Bessel beams", Proc. SPIE 11240, Photons Plus Ultrasound: Imaging and Sensing 2020, 1124014 (5 March 2020); https://doi.org/10.1117/12.2551305

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