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首页> 外文期刊>Optical fiber technology >Development of a highly accurate and fast responsive salinity sensor based on Nuttall apodized Fiber Bragg Grating coated with hygroscopic polymer for ocean observation
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Development of a highly accurate and fast responsive salinity sensor based on Nuttall apodized Fiber Bragg Grating coated with hygroscopic polymer for ocean observation

机译：基于Nuttall切趾的光纤布拉格光栅涂有吸湿性聚合物的高精度和快速响应盐度传感器的开发，用于海洋观测

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摘要

This paper experimentally demonstrates the salinity sensing characteristic of an apodized Fiber Bragg Grating (FBG) coated with a hygroscopic polymer. Polyimide (PI) was used as the coating material on the FBG inscribed with Nuttall apodization function. PI coating enhances sensitivity by its hygroscopic property and apodization increases detection accuracy by reducing side lobes in the reflected spectrum. Based on experimental results, it was observed that the proposed salinity sensor has a sensitivity of 0.0026 nm/Practical Salinity Unit (PSU) with a resolution of 0.115 PSU in the range of 0 PSU to 40 PSU with an average response time of 60 seconds. Validation results using commercially available ocean sensors indicated that the proposed optical fiber sensor is capable of measuring seawater salinity with a mean error of 0.2015 PSU.
机译：本文实验证明了涂有吸湿性聚合物的切趾纤维布拉格光栅（FBG）的盐度感测特性。聚酰亚胺（PI）用作FBG上具有Nuttall切趾功能的涂层材料。 PI涂层具有吸湿性，可提高灵敏度，切趾可通过减少反射光谱中的旁瓣来提高检测精度。根据实验结果，观察到所提出的盐度传感器的灵敏度为0.0026 nm /实用盐度单位（PSU），分辨率为0.115 PSU，范围为0 PSU至40 PSU，平均响应时间为60秒。使用市售海洋传感器的验证结果表明，所提出的光纤传感器能够测量海水盐度，平均误差为0.2015 PSU。

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