Shi Yufei, Wu Jun, Zhou Jun, Xie Zihan, Wang Fuxiang, Gao Feng, Dong Jie, Wang Zhaokun, Wang Qiang, Shen Changyu
Opt Lett. 2024 Aug 1;49(15):4258-4261. doi: 10.1364/OL.528198.
A humidity sensor based on an optical fiber Mach-Zehnder interferometer (MZI) coated with a GO/MoS@PVA composite membrane was investigated for non-contact sensing. MoS was used as a nanospacer to enhance the humidity-sensitive properties of GO, and the adhesion and stability of the composite membrane on the fiber surface could be increased by PVA. The proposed sensor shows a maximum sensitivity of 0.26 dB/%RH with average response and recovery times of 1.62 and 1.11 s, respectively. In non-contact sensing applications, the sensor can effectively recognize a maximum distance of 10 mm for the proximity of a human finger with a distance variation interval of 3 mm. The proposed sensor is expected to be applied in non-contact distance detection and localization or as a non-contact human-computer interaction panel.
研究了一种基于涂覆有GO/MoS@PVA复合膜的光纤马赫-曾德尔干涉仪（MZI）的湿度传感器用于非接触式传感。MoS用作纳米间隔物以增强GO的湿度敏感特性，并且PVA可以提高复合膜在光纤表面的附着力和稳定性。所提出的传感器的最大灵敏度为0.26 dB/%RH，平均响应时间和恢复时间分别为1.62 s和1.11 s。在非接触式传感应用中，该传感器能够有效识别手指靠近时最大10 mm的距离，距离变化间隔为3 mm。所提出的传感器有望应用于非接触式距离检测和定位，或用作非接触式人机交互面板。
