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20 December 2019 Optical fiber hydrogen sensor based on a no-core fiber structure
Xuhui Zhang, Yun Liu, Qiang Liu, Huizhen Yuan, Mengdi Lu, Shuwen Chu, Wei Peng
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Proceedings Volume 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019); 112091X (2019) https://doi.org/10.1117/12.2547694
Event: Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 2019, Xi'an, China
Abstract
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% H2) to 1800s (0.5% H2) depending on the hydrogen concentration. The recovery time of this sensor is from 1200s (4% H2) to 4800s (0.5% H2) depending on the hydrogen concentration. Furthermore, the repeatability and response time of the sensor of this study are investigated experimentally.
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Xuhui Zhang, Yun Liu, Qiang Liu, Huizhen Yuan, Mengdi Lu, Shuwen Chu, and Wei Peng "Optical fiber hydrogen sensor based on a no-core fiber structure", Proc. SPIE 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 112091X (20 December 2019); https://doi.org/10.1117/12.2547694
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KEYWORDS
Hydrogen
Sensors
Palladium
Fiber optics sensors
Coating
Refractive index
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