Colchester, RJ; Zhang, EZ; Beard, PC; Desjardins, AE; (2023) Single Optical Fibre Ultrasound Transducer for Rotational Imaging. In: Proceedings Volume 12608, Biomedical Imaging and Sensing Conference; 1260802. SPIE: Yokohama, Japan.

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Abstract

All-optical ultrasound imaging has emerged as paradigm that is well-suited to highly miniaturized applications. With this technique, ultrasound is both generated and received using light, allowing the use of optical fibres for device fabrication. Ultrasound generation typically requires multimode light delivery to provide the pulse energies needed for high pressure generation. Whilst ultrasound reception typically requires single mode light delivery to provide high sensitivity. This means that devices have typically comprised two optical fibres, one multimode for ultrasound generation and one single mode for ultrasound reception. Recently, we demonstrated an all-optical ultrasound imaging device based on a single dual-clad optical fibre. In this work, we build on our previous study and demonstrate rotational imaging with this device. Two copper wire phantoms were imaged, and the wire were well-resolved, demonstrating a signal-to-noise >20 dB. The presented device and system are well-suited for use in minimally invasive and intravascular imaging applications and future work will focus on translating the device.

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