Shagroun Fadwa, Colchester Richard James, Alles Erwin Jozef
Department of Medical Physics and Biomedical Engineering, University College London, London, United Kingdom.
Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, London, United
JASA Express Lett. 2024 Aug 1;4(8). doi: 10.1121/10.0028202.
The small size, high sensitivity, and immunity to electromagnetic interference of fibre-optic ultrasound sensors make them highly attractive for applications in biomedical imaging and metrology. Typically, such sensors rely on optically resonant structures, such as Fabry-Perot cavities, that require elaborate fabrication techniques. Here, an alternative fibre-optic ultrasound sensor is presented that comprises a simple deformable and reflective structure that was deposited using simple dip-coating. Interrogation with a laser Doppler vibrometer demonstrated how this sensor achieved a sensitivity, signal-to-noise ratio, and noise-equivalent pressure that outperformed piezoelectric hydrophones, whilst offering a highly miniature form factor, turn-key operation, and simple fabrication.
光纤超声传感器体积小、灵敏度高且不受电磁干扰，这使其在生物医学成像和计量学应用中极具吸引力。通常，此类传感器依赖于光学谐振结构，如法布里 - 珀罗腔，而这需要复杂的制造技术。在此，我们展示了一种替代型光纤超声传感器，它包含一个简单的可变形反射结构，该结构通过简单的浸涂法沉积而成。用激光多普勒振动计进行的检测表明，这种传感器实现了优于压电水听器的灵敏度、信噪比和噪声等效压力，同时具有高度微型的外形尺寸、交钥匙操作和简单的制造工艺。
