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Fiber optic sensors for sub-centimeter spatially resolved measurements: Review and biomedical applications

机译：用于亚厘米空间分辨测量的光纤传感器：综述和生物医学应用

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摘要

One of the current frontier of optical fiber sensors, and a unique asset of this sensing technology is the possibility to use a whole optical fiber, or optical fiber device, as a sensor. This solution allows shifting the whole sensing paradigm, from the measurement of a single physical parameter (such as temperature, strain, vibrations, pressure) to the measurement of a spatial distribution, or profiling, of a physical parameter along the fiber length. In the recent years, several technologies are achieving this task with unprecedentedly narrow spatial resolution, ranging from the sub-millimeter to the centimeter-level. In this work, we review the main fiber optic sensing technologies that achieve a narrow spatial resolution: Fiber Bragg Grating (FBG) dense arrays, chirped FBG (CFBG) sensors, optical frequency domain reflectometry (OFDR) based on either Rayleigh scattering or reflective elements, and microwave photonics (MWP). In the second part of the work, we present the impact of spatially dense fiber optic sensors in biomedical applications, where they find the main impact, presenting the key results obtained in thermo-therapies monitoring, high-resolution diagnostic, catheters monitoring, smart textiles, and other emerging applicative fields.
机译：光纤传感器的当前前沿之一，并且这种传感技术的独特资产是可以使用整个光纤或光纤设备作为传感器。该解决方案允许将整个传感范式从单个物理参数（例如温度，应变，振动，压力）的测量转换为沿着光纤长度的物理参数的空间分布或轮廓的测量。近年来，几种技术以前所未有的狭窄空间分辨率（从亚毫米到厘米级）实现了这一任务。在这项工作中，我们回顾了实现狭窄空间分辨率的主要光纤传感技术：光纤布拉格光栅（FBG）密集阵列，chi FBG（CFBG）传感器，基于瑞利散射或反射元件的光频域反射仪（OFDR）和微波光子学（MWP）。在工作的第二部分中，我们介绍了空间密集型光纤传感器在生物医学应用中的影响，他们在其中发现了主要影响，并介绍了在热疗法监测，高分辨率诊断，导管监测，智能纺织品中获得的关键结果，以及其他新兴的应用领域。

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