Dai Jixiang, Yang Minghong, Chen Yun, Cao Kun, Liao Hansheng, Zhang Pengcheng
National Engineering Laboratory for Optical Fiber Sensors, Wuhan University of Technology, Wuhan, China.
Opt Express. 2011 Mar 28;19(7):6141-8. doi: 10.1364/OE.19.006141.
WO3-Pd composite films were deposited on the side-face of side-polished fiber Bragg grating as sensing elements by magnetron sputtering process. XRD result indicates that the WO3-Pd composite films are mainly amorphous. Compared to standard FBG coated with same hydrogen sensitive film, side-polished FBG significantly increase the sensor's sensitivity. When hydrogen concentrations are 4% and 8% in volume percentage, maximum wavelength shifts of side-polished FBG are 25 and 55 pm respectively. The experimental results show the sensor's hydrogen response is reversible, and side-polished FBG hydrogen sensor has great potential in hydrogen's measurement.
采用磁控溅射工艺，将WO₃-Pd复合薄膜沉积在侧面抛光光纤布拉格光栅的侧面作为传感元件。X射线衍射结果表明，WO₃-Pd复合薄膜主要为非晶态。与涂覆相同氢敏薄膜的标准光纤布拉格光栅相比，侧面抛光光纤布拉格光栅显著提高了传感器的灵敏度。当氢气体积分数分别为4%和8%时，侧面抛光光纤布拉格光栅的最大波长漂移分别为25 pm和55 pm。实验结果表明该传感器的氢响应具有可逆性，侧面抛光光纤布拉格光栅氢传感器在氢气测量方面具有很大潜力。
