Bai Wei, Yang Minghong, Dai Jixiang, Yu Haihu, Wang Gaopeng, Qi Chongjie
Opt Express. 2016 Feb 22;24(4):3230-7. doi: 10.1364/OE.24.003230.
A novel relative humidity (RH) sensing network based on ultra-weak fiber Bragg gratings (FBGs) is proposed and demonstrated. Experiment is demonstrated on a 5 serial ultra-weak FBGs sensing network chopped from a fiber array with 1124 FBGs. Experimental results show that the corresponding RH sensitivity varies from 1.134 to 1.832 pm/%RH when ambient environmental RH changes from 23.8%RH to 83.4%RH. The low-reflectance FBGs and time-division multiplexing (TDM) technology makes it possible to multiplex thousands of RH sensors in single optical fiber.
提出并演示了一种基于超弱光纤布拉格光栅（FBG）的新型相对湿度（RH）传感网络。在从包含1124个FBG的光纤阵列中截取的5个串联超弱FBG传感网络上进行了实验演示。实验结果表明，当环境相对湿度从23.8%RH变化到83.4%RH时，相应的相对湿度灵敏度在1.134至1.832 pm/%RH之间变化。低反射率FBG和时分复用（TDM）技术使得在单根光纤中复用数千个相对湿度传感器成为可能。
