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Proceedings Paper

Fiber Bragg grating based measurement of elastic properties at cryogenic temperatures
Author(s): Ines Latka; Wolfgang Ecke; Bernd Höfer; Tobias Habisreuther; Johannes Peter Kallmeyer
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Paper Abstract

For applications over a wide temperature range, it is important to know the temperature effect on certain material parameters, as e.g., Young's modulus, reversibility of elastic deformations, or coefficient of thermal expansion. Especially at cryogenic temperatures, the low temperature dependence of the Bragg wavelength is advantageous for measuring strain effects. It was already demonstrated that fiber Bragg gratings can be used to measure the coefficient of thermal expansion of super-conducting materials [1]. In this paper, we present a method for the measurement of the temperature dependent changes of Young's modulus, down to temperatures of 4.2 K (liquid helium). Deformation samples made of CuBe bronze have been prepared for first tests showing best reversibility.

Paper Details

Date Published: 19 October 2007
PDF: 8 pages
Proc. SPIE 6770, Fiber Optic Sensors and Applications V, 677004 (19 October 2007); doi: 10.1117/12.735498
Show Author Affiliations
Ines Latka, Institute of Photonic Technology (Germany)
Wolfgang Ecke, Institute of Photonic Technology (Germany)
Bernd Höfer, Institute of Photonic Technology (Germany)
Tobias Habisreuther, Institute of Photonic Technology (Germany)
Johannes Peter Kallmeyer, Max Planck Institute for Plasma Physics (Germany)

Published in SPIE Proceedings Vol. 6770:
Fiber Optic Sensors and Applications V
Eric Udd, Editor(s)

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