Single and low order mode interrogation of a multimode sapphire fiber Bragg grating sensor with tapered fibers

Dan Grobnic; Stephen James Mihailov; H. Ding; F. Bilodeau; Christopher W. Smelser

doi:10.1117/12.623592

23 May 2005 Single and low order mode interrogation of a multimode sapphire fiber Bragg grating sensor with tapered fibers

Dan Grobnic, Stephen James Mihailov, H. Ding, F. Bilodeau, Christopher W. Smelser

Author Affiliations +

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623592
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

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.

Citation Download Citation

Dan Grobnic, Stephen James Mihailov, H. Ding, F. Bilodeau, and Christopher W. Smelser "Single and low order mode interrogation of a multimode sapphire fiber Bragg grating sensor with tapered fibers", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.623592

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