Optical fiber evanescent hydrogen sensor based on Bragg grating coated with nanoparticles

被引：0
作者：
Abdalwareth, Ahmad [1 ,2 ]
Flachenecker, Guenter [1 ]
Angelmahr, Martin [1 ]
Schade, Wolfgang [1 ,2 ]
机构：
[1] Fraunhofer Heinrich Hertz Inst, Stollen 19H, D-38640 Goslar, Germany
[2] Tech Univ Clausthal, IEPT, Stollen 19A, D-38640 Goslar, Germany
来源：
OPTICAL FIBERS AND SENSORS FOR MEDICAL DIAGNOSTICS, TREATMENT AND ENVIRONMENTAL APPLICATIONS XXIII | 2023年 / 12372卷
关键词：
Etched fiber Bragg grating; Evanescent field sensor; palladium nanoparticles; hydrogen sensor; SENSITIVITY;
D O I：
10.1117/12.2647674
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Hydrogen has attracted much attention as a source of clean and sustainable energy. However, one of the drawbacks of handling hydrogen as a power source is its volatility and flammability. Moreover, hydrogen leakages in gas pipelines or tanks can generate highly explosive gas mixtures in air, if the hydrogen concentrations exceed 4 %. Therefore, in order to increase the security, monitoring of hydrogen concentrations in hydrogen infrastructures is mandatory. Remote sensing systems using passive fiber optical sensors are predestined for these kinds of applications. In this paper, a sensor based on evanescent field fiber Bragg grating (FBG), coated with palladium (Pd) nanoparticles is proposed. Thereby, the intensity change of the sensor signal correlates with the hydrogen concentration. The detection range of the sensor is between 0.5 % to 5 % H-2 in nitrogen or synthetic air atmosphere and therefore shows great potential for the detection of hydrogen leakages below the explosive limit of 4 %
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页数：6
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