U-shaped microfiber coupler coated with polyvinyl alcohol film for highly sensitive humidity detection
U-shaped microfiber coupler coated with polyvinyl alcohol film for highly sensitive humidity detection
复制标题
DOI：
10.1016/j.sna.2018.12.005
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Yong Zhao;Yun Peng;Mao-qing Chen;Feng Xia;Rui-jie Tong
中科院分区：
文献类型：
--
作者：
Yong Zhao;Yun Peng;Mao-qing Chen;Feng Xia;Rui-jie Tong
提出并研制了一种将U型微光纤耦合器（MFC）与聚乙烯醇涂层相结合的探针式相对湿度传感器。光学MFC对环境折射率的变化非常敏感，被认为是一种优良的湿度传感器。通过在MFC的腰区表面覆盖一层PVA膜，进一步提高了传感器的灵敏度。实验结果表明，该传感器在15%-85%RH范围内波长与相对湿度呈良好的线性关系，灵敏度为318.1pm/%RH。温度实验结果表明，该传感器在20 °C ~ 50 °C范围内的温度灵敏度约为13.9 pm/°C，表明该传感器具有低温敏性能。
A probe-type relative humidity (RH) sensor was proposed and developed by combination of a U-shaped microfiber coupler (MFC) and a polyvinyl alcohol coating. Optical MFC is considered as an excellent kind of humidity sensor due to its highly sensitive to the environmental RI changes. By covering one layer of PVA film onto the surface of the waist region of the MFC, the sensitive of the proposed sensor was further increased. Experiment results indicated that the proposed sensor exhibited a good linear relationship between the wavelength and relative humidity over the 15%–85%RH range and which also exhibited sensitivity are about 318.1 pm/%RH. And temperature experiment results showed that the temperature sensitivity of the proposed sensor is about 13.9 pm/°C over the 20 °C to 50 °C rang, which indicated that the proposed sensor has the performance of being low temperature sensitive.