脉冲激光沉积（PLD）镀膜法是一种制备光纤氢气传感器的潜在方法，利用脉冲准分子激光低温沉积技术，在光纤法布里-珀罗（F-P）腔的敏感膜片上制备了钯/银（Pd/Ag）合金薄膜，X 射线衍射（XRD）和原子力显微镜（AFM）表征显示在较高的脉冲激光能量和低温下可以获得结晶度好的Pd/Ag 合金薄膜。将该F-P 腔封装在限制Pd/Ag 膜层吸氢后膨胀方向的套管结构中，利用Pd/Ag 膜层吸氢后膨胀导致F-P 腔腔长改变的特性制备了氢气传感探头来测试该Pd/Ag 膜的氢气敏感特性，实验结果表明，该传感器可以用来检测氢气浓度的变化。

Pulsed laser deposition is a potential preparation method for optical fiber hydrogen sensor. Pd/Ag thin films are prepared through pulsed laser deposition at a low temperature by excimer laser. It is found that Pd/Ag thin films with fine crystal structure are obtained under high pulse laser energy at low temperature by X-ray diffraction (XRD) and atomic force microscope (AFM) methods. The F-P sensor is packaged in a casing structure that can limit the expansion direction of Pd/Ag thin films which absorbs hydrogen. Hydrogen sensing probe is made to test the hydrogen sensing properties of Pd/Ag thin films for the characteristic that the expansion of Pd/Ag thin films which absorbs hydrogen can lead to the change of the F-P cavity. Experiment results show that the sensor can be used to detect the changes of the hydrogen concentration.