Ultrafast and Reproducible Fiber-Optic Hydrogen Sensor via a Tilted Fiber Grating With Pd/WO_(3) Nanocoating  

作　　者：Zhiyong YANG Xiangyu YAN Bo PENG Zhencheng LI Xudong XIA Changhai LU Daotong YOU Kaiwei LI Tuan GUO 

机构地区：[1]Institute of Photonics Technology,College of Physics and Optoelectronic Engineering,Jinan University,Guangzhou510632,China [2]Institute for Environmental and Climate Research,Jinan University,Guangzhou 511443,China [3]Key Laboratory of Bionic Engineering of Ministry of Education,Jilin University,Changchun 130022,China

出　　处：《Photonic Sensors》2025年第2期162-171,共10页光子传感器(英文版)

基　　金：funding from the Program of Marine Economy Development Special Fund under the Department of Natural Resources of Guangdong Province,China[Grant No.GDNRC[2023]23].

摘　　要：Hydrogen,a high-density and clean energy,has been widely used in various critical applications.However,the safety risk caused by hydrogen leakage during storage and transportation is still a non-negligible issue.Therefore,it is necessary to offer hydrogen sensors with fast response and high repeatability,and it will be perfect for achieving in situ monitoring over the lifecycle of hydrogen production and utilization.Here,we propose a compact optical fiber sensor with a short section of the tilted Bragg fiber grating(TFBG)inscribed in the fiber core and a palladium and tungsten trioxide(Pd/WO_(3))combined film of 40 nm thickness over the fiber surface.The TFBG excites tens of narrow cladding resonances,part of which possess refractive indexes matching that of the Pd/WO_(3) coating and providing the high sensitivity to the surrounding hydrogen concentration change.The sensor offers improved sensing characteristics,including the fast response time(less than 10 s),high repeatability(over tens of measurement),and excellent linear response(higher than 99.6%)over the 0%to 3%concentration range.

关 键 词：Hydrogen measurement optical fiber sensor tilted fiber Bragg grating PALLADIUM tungsten trioxide 

分 类 号：O436[机械工程—光学工程] TN253[理学—光学]