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光纤水听器用于检测高强度超声波。

Fiber-optic hydrophone for detection of high-intensity ultrasound waves.

出版信息

Opt Lett. 2023 May 15;48(10):2615-2618. doi: 10.1364/OL.488862.

DOI:10.1364/OL.488862
PMID:37186722
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10575604/
Abstract

Fiber-optic hydrophones (FOHs) are widely used to detect high-intensity focused ultrasound (HIFU) fields. The most common type consists of an uncoated single-mode fiber with a perpendicularly cleaved end face. The main disadvantage of these hydrophones is their low signal-to-noise ratio (SNR). To increase the SNR, signal averaging is performed, but the associated increased acquisition times hinder ultrasound field scans. In this study, with a view to increasing SNR while withstanding HIFU pressures, the bare FOH paradigm is extended to include a partially reflective coating on the fiber end face. Here, a numerical model based on the general transfer-matrix method was implemented. Based on the simulation results, a single-layer, 172 nm TiO-coated FOH was fabricated. The frequency range of the hydrophone was verified from 1 to 30 MHz. The SNR of the acoustic measurement with the coated sensor was 21 dB higher than that of the uncoated one. The coated sensor successfully withstood a peak positive pressure of 35 MPa for 6000 pulses.

摘要

光纤水听器（FOHs）广泛用于检测高强度聚焦超声（HIFU）场。最常见的类型由无涂层单模光纤和垂直切割的端面组成。这些水听器的主要缺点是信噪比（SNR）低。为了提高 SNR，需要进行信号平均，但相关的采集时间增加会阻碍超声场扫描。在这项研究中，为了在承受 HIFU 压力的同时提高 SNR，将裸光纤水听器范式扩展到包括光纤端面的部分反射涂层。在这里，实现了基于广义传输矩阵方法的数值模型。基于仿真结果，制造了一个单层、172nmTiO 涂层的 FOH。水声测量的频率范围从 1 到 30MHz 进行了验证。与未涂层传感器相比，涂层传感器的声测量 SNR 提高了 21dB。涂层传感器成功承受了 35MPa 的峰值正压 6000 次脉冲。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4cbd/10575604/3907fd704cc8/ol-48-10-2615-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4cbd/10575604/aa473eda5abd/ol-48-10-2615-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4cbd/10575604/e0bc1e866933/ol-48-10-2615-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4cbd/10575604/714ac8e1a608/ol-48-10-2615-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4cbd/10575604/675e9d2b8ea9/ol-48-10-2615-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4cbd/10575604/3907fd704cc8/ol-48-10-2615-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4cbd/10575604/aa473eda5abd/ol-48-10-2615-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4cbd/10575604/e0bc1e866933/ol-48-10-2615-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4cbd/10575604/714ac8e1a608/ol-48-10-2615-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4cbd/10575604/675e9d2b8ea9/ol-48-10-2615-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4cbd/10575604/3907fd704cc8/ol-48-10-2615-g005.jpg

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Rapid Spatial Mapping of Focused Ultrasound Fields Using a Planar Fabry-Pérot Sensor.利用平面法布里-珀罗传感器快速绘制聚焦超声场的空间图谱。
IEEE Trans Ultrason Ferroelectr Freq Control. 2017 Nov;64(11):1711-1722. doi: 10.1109/TUFFC.2017.2748886. Epub 2017 Sep 4.
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膜式水听器测量和数值模拟高强度聚焦超声场直至冲击波形成阶段。
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