点击次数：

论文类型：会议论文

发表时间：2019-01-01

收录刊物：EI、CPCI-S

卷号：11209

关键字：Hydrogen sensor; No-core fiber; Palladium coating

摘要：A novel and simple optical fiber structure with a section of no-core fiber for measuring hydrogen concentration is presented. Palladium is sputtered to form the coating on the no-core fiber by magnetron sputtering coater. Under different hydrogen conditions, the absorption of hydrogen induced refractive index changes on the outside coating of no-core fiber will lead to the variations of the optical output spectrum. Different concentrations of hydrogen are tested, from 4%-0.5%, shows the concentration is relevant with the response time and recovery time. The response time of this sensor is from 300s (4% H-2) to 1800s (0.5% H-2) depending on the hydrogen concentration. The recovery time of this sensor is from 1200s (4% H-2) to 4800s (0.5% H-2) depending on the hydrogen concentration. Furthermore, the repeatability and response time of the sensor of this study are investigated experimentally.