title: Side-polished fiber Bragg grating hydrogen sensor with WO3-Pd composite film as sensing materials.
abstract: 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.
authors: National Engineering Laboratory for Optical Fiber Sensors, Wuhan University of Technology, Wuhan, China.
authors: Jixiang
authors: J
authors: Dai
authors: Minghong
authors: M
authors: Yang
authors: Yun
authors: Y
authors: Chen
authors: Kun
authors: K
authors: Cao
authors: Hansheng
authors: H
authors: Liao
authors: Pengcheng
authors: P
authors: Zhang
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D006859:Hydrogen / Q000032:analysis*; D008567:Membranes, Artificial; D010087:Oxides / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D014159:Transducers; D014414:Tungsten / Q000737:chemistry*
chemical_list: D008567:Membranes, Artificial; D010087:Oxides; D006859:Hydrogen; C511604:tungsten oxide; D014414:Tungsten