Hydrogen detection in high pressure gas mixtures using a twin hole fibre Bragg grating

Dan Grobnic; Stephen J. Mihailov; Robert B. Walker; Gino Cuglietta; Christopher W. Smelser

doi:10.1117/12.885954

17 May 2011 Hydrogen detection in high pressure gas mixtures using a twin hole fibre Bragg grating

Dan Grobnic, Stephen J. Mihailov, Robert B. Walker, Gino Cuglietta, Christopher W. Smelser

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77537D (2011) https://doi.org/10.1117/12.885954
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

A sensor for detecting high-pressure hydrogen gas is presented that is based on Bragg gratings inscribed in a microstructured twin hole optical fibre with femtosecond pulse duration 800 nm radiation and a phase mask. Utilising the well-known variation of refractive index of silica upon exposure to hydrogen gas, the presence of hydrogen results in a shift of the Bragg resonance. The use of a microstructured fibre design allows for more rapid diffusion of H₂ into and out of the fibre core resulting in faster detection of hydrogen gas compared to standard optical fibre. Grating inscription with the femtosecond laser technique allows for sensor operation at high temperatures.

Citation Download Citation

Dan Grobnic, Stephen J. Mihailov, Robert B. Walker, Gino Cuglietta, and Christopher W. Smelser "Hydrogen detection in high pressure gas mixtures using a twin hole fibre Bragg grating", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77537D (17 May 2011); https://doi.org/10.1117/12.885954

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