Micro bending beam based optical fiber grating sensors for physical and chemical measurands

Ines Latka; Wolfgang Ecke; Bernd Hoefer; Thomas Frangen; Reinhardt Willsch; Arnd Reutlinger

doi:10.1117/12.623446

23 May 2005 Micro bending beam based optical fiber grating sensors for physical and chemical measurands

Ines Latka, Wolfgang Ecke, Bernd Hoefer, Thomas Frangen, Reinhardt Willsch, Arnd Reutlinger

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623446
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

Abstract

We propse the application of sensors based on the intrinsic bend sensitivity of Bragg gratings inscribed in D-shaped fibers. The first example is a viscosity sensor, consisting of the D-shaped fiber with a sphere attached to the tip of the fiber. The force exerted on the sphere by the laminar flow of a fluid with unknown viscosity bends the fiber, and with this shifts the Bragg wavelength of the inscribed Bragg grating. The other one is a hydrogen senosr, which uses the influence of hydrogen on a palladium foil attached to the Bragg grating. The palladium foil, which is frictionally connected to the flat surface of the D-shaped fiber, is stretched under the influence of hydrogen and with this stretches/bends the fiber.

Citation Download Citation

Ines Latka, Wolfgang Ecke, Bernd Hoefer, Thomas Frangen, Reinhardt Willsch, and Arnd Reutlinger "Micro bending beam based optical fiber grating sensors for physical and chemical measurands", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.623446

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