Broadband optical ultrasound sensor with a unique open-cavity structure
Broadband optical ultrasound sensor with a unique open-cavity structure
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DOI：
10.1117/1.3528014
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发表时间：
2011-01-01
影响因子：
3.5
通讯作者：
Ye, Jing Yong
中科院分区：
文献类型：
--
作者：
Chow, Cohn M.;Zhou, Yun;Ye, Jing Yong
高分辨率超声成像需要具有宽带宽和高灵敏度的优质传感器，正如广泛的应用所示，包括心血管疾病的血管内成像。然而，目前水听器制造的主要方法压电技术在高频范围内遇到了许多技术限制。使用光学技术检测高频超声信号最近引起了人们的广泛关注。研究最多的方法之一是基于法布里-珀罗干涉仪，该干涉仪由夹在两个镜子之间的光学腔组成。该技术具有良好的灵敏度和带宽，是压电聚偏二氟乙烯 (PVDF) 水听器的潜在替代品。我们提出了一种创新的光学超声传感器，在全内反射配置中仅使用单个镜子。除了保留基于法布里-珀罗干涉仪的超声波传感器的优点外，这种独特的设计还提供至少 160 MHz 的带宽，可能降低制造成本并提高信号保真度。 (C) 2011 年光电仪器工程师协会 (SPIE)。 [DOI：10.1117/1.3528014]
High-resolution ultrasound imaging requires quality sensors with wide bandwidth and high sensitivity, as shown in a wide range of applications, including intravascular imaging of cardiovascular diseases. However, piezoelectric technology, the current dominant approach for hydrophone fabrication, has encountered many technical limitations in the high-frequency range. Using optical techniques for the detection of high-frequency ultrasound signals has attracted much recent attention. One of the most studied approaches is based on a Fabry-Perot interferometer, consisting of an optical cavity sandwiched between two mirrors. This technique offers promising sensitivity and bandwidth, and a potential alternative to piezoelectric polyvinylidene fluoride (PVDF) hydrophones. We propose an innovative optical ultrasound sensor using only a single mirror in a total-internal-reflection configuration. Besides retaining the advantages of Fabry-Perot interferometer-based ultrasound sensors, this unique design provides a bandwidth of at least 160 MHz, a potential decrease in fabrication cost, and an increase in signal fidelity. (C) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.3528014]