FBG Hydrogen Sensor Based on Pd87–Ni13/Pd4–Ag1 Thin Film and Femtosecond Laser Ablation

dc.contributor.author	Zhou, X., Karanja, J. M., Yang, M., Zhou, F., Liu, K., Ming, X., & Dai, Y
dc.date.accessioned	2022-01-18T08:36:16Z
dc.date.available	2022-01-18T08:36:16Z
dc.date.issued	2021-12
dc.identifier.uri	http://repository.kyu.ac.ke/123456789/750
dc.description.abstract	A novel laser machined spiral microstructure fiber Bragg grating (FBG) hydrogen sensor and coated with composite sensing film is presented. The sensor probes are sputtered with Pd/Ni and Pd/Ag film, respectively. Experimental results exhibit that a pitch 60 μm FBG with double spiral microstructures, coated with 520 nm Pd/Ni and Pd/Ag film has hydrogen gas sensitivity in air of 13 pm/%H and 25 pm/%H, respectively. The laser-ablated spiral microstructured probes with composite films shown greater sensitivity compared with standard FBG probes with similar coating. The optimum testing temperature (50 °C) enhanced the sensitivity and repeatability of the probes.	en_US
dc.language.iso	en	en_US
dc.publisher	Integrated Ferroelectrics	en_US
dc.subject	Femtosecond laser, hydrogen gas sensor, spiral microgroove, fiber Bragg grating, Pd–Ni, Pd/Ag	en_US
dc.title	FBG Hydrogen Sensor Based on Pd87–Ni13/Pd4–Ag1 Thin Film and Femtosecond Laser Ablation	en_US
dc.type	Article	en_US