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9 March 2023 Development of high sensitivity plano-concave optical microresonators sensors for photoacoustic imaging
David Martin-Sanchez, Edward Z. Zhang, Zhixin Liu, James Guggenheim, Paul C. Beard
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Proceedings Volume PC12379, Photons Plus Ultrasound: Imaging and Sensing 2023; PC123791O (2023) https://doi.org/10.1117/12.2654566
Event: SPIE BiOS, 2023, San Francisco, California, United States
Abstract
Deep tissue applications (>1 cm) for photoacoustic imaging are limited for traditional Fabry-Perot (FP) ultrasound transducers interrogated by tightly focused Gaussian beams due to beam walk-off, but are in principle feasible for plano-concave optical microresonator (PCMR) sensors. However, in practice, making PCMR sensors with sufficiently high sensitivity is challenging. We explore several approaches to maximise sensitivity and overcome the limitations associated with using high-Q PCMR sensors. The results show an improvement in the sensitivity and the minimum detectable pressure, enabling an increase of the penetration depth in tomographic photoacoustic imaging.
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David Martin-Sanchez, Edward Z. Zhang, Zhixin Liu, James Guggenheim, and Paul C. Beard "Development of high sensitivity plano-concave optical microresonators sensors for photoacoustic imaging", Proc. SPIE PC12379, Photons Plus Ultrasound: Imaging and Sensing 2023, PC123791O (9 March 2023); https://doi.org/10.1117/12.2654566
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KEYWORDS
Sensors
Microresonators
Photoacoustic imaging
Image sensors
Photoacoustic spectroscopy
Protactinium
Signal attenuation
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