This paper proposes a trace hydrogen sensing system based on distributed feedback fiber laser (DFB-FL). The sensor head was fabricated by inserting the DFB-FL into a glass capillary coated with hydrogen sensitive material. The wavelength of the DFB-FL changed under the exothermic reaction of |
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Hydrogen
Sensors
Fiber Bragg gratings
Head
Sensing systems
Optical engineering
Capillaries