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Proceedings Paper

Single and low order mode interrogation of a multimode sapphire fiber Bragg grating sensor with tapered fibers
Author(s): Dan Grobnic; Stephen James Mihailov; H. Ding; F. Bilodeau; Christopher W. Smelser
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Paper Abstract

Multimode sapphire fiber Bragg gratings (SFBG) made with an IR femtosecond laser and a phase mask were probed using tapered single mode fibers of different taper diameters producing single and low order mode reflection/transmission responses. A configuration made of an input single mode tapered fiber and multimode silica fiber used for output coupling was also tested and has delivered a filtered multimode transmission spectrum. The tapered coupling improved the spectral resolution of the SFBG as compared to its multimode responses previously reported. Such improvements facilitate the utilization of the SFBG as a high temperature sensor. Wavelength shifts of the single mode response were monitored as a function of temperature up to 1500 °C and were consistent with the measurement obtained from the multimode response published previously.

Paper Details

Date Published: 23 May 2005
PDF: 4 pages
Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.623592
Show Author Affiliations
Dan Grobnic, Communications Research Ctr. Canada (Canada)
Stephen James Mihailov, Communications Research Ctr. Canada (Canada)
H. Ding, Communications Research Ctr. Canada (Canada)
F. Bilodeau, Communications Research Ctr. Canada (Canada)
Christopher W. Smelser, Communications Research Ctr. Canada (Canada)

Published in SPIE Proceedings Vol. 5855:
17th International Conference on Optical Fibre Sensors
Marc Voet; Reinhardt Willsch; Wolfgang Ecke; Julian Jones; Brian Culshaw, Editor(s)

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