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Proceedings Paper

Hydrogen detection in high pressure gas mixtures using a twin hole fibre Bragg grating
Author(s): Dan Grobnic; Stephen J. Mihailov; Robert B. Walker; Gino Cuglietta; Christopher W. Smelser
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Paper 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.

Paper Details

Date Published: 17 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77537D (17 May 2011); doi: 10.1117/12.885954
Show Author Affiliations
Dan Grobnic, Communications Research Ctr. Canada (Canada)
Stephen J. Mihailov, Communications Research Ctr. Canada (Canada)
Robert B. Walker, Communications Research Ctr. Canada (Canada)
Gino Cuglietta, Communications Research Ctr. Canada (Canada)
Christopher W. Smelser, Communications Research Ctr. Canada (Canada)

Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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