材料科学
石墨烯
相对湿度
聚乙烯醇
光纤
复合数
光纤传感器
响应时间
光电子学
氧化物
湿度
光学
线性
涂层
复合材料
纤维
纳米技术
电子工程
物理
冶金
计算机图形学(图像)
工程类
计算机科学
热力学
作者
Yuqing Sun,Jiachen Guo,Yinfeng Xiao,Jiulun Fan,Jigang Chen,Dong Zhao,Bo Jia
出处
期刊:Applied Optics
[The Optical Society]
日期:2022-07-27
卷期号:61 (22): 6658-6658
被引量:1
摘要
A new coupled fiber optic humidity sensor based on a double-tapered fiber twisted weakly coupled structure coated with a graphene oxide/polyvinyl alcohol (GO/PVA) film has been reported for the first time, to the best of our knowledge. The sensor adopts a 2×2 coupler structure with a waist diameter of 20 µm. The GO/PVA composite film is coated in the weakly coupled area to increase the sensitivity of the sensor. The thickness of the coating layer is about 3 µm. The sensor can realize linear sensing in the relative humidity (RH) range of 45%-85%RH with a dynamic response time of 1.9 s and a recovery time of 5.7 s. The sensitivity of the sensor is up to 0.002/%RH, and the linearity of the sensor is as high as 98.65%. Moreover, the sensor has good stability, reversibility, and low-temperature crosstalk.
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