Fiber Bragg grating based measurement of elastic properties at cryogenic temperatures

Ines Latka; Wolfgang Ecke; Bernd Höfer; Tobias Habisreuther; Johannes Peter Kallmeyer

doi:10.1117/12.735498

19 October 2007 Fiber Bragg grating based measurement of elastic properties at cryogenic temperatures

Ines Latka, Wolfgang Ecke, Bernd Höfer, Tobias Habisreuther, Johannes Peter Kallmeyer

Proceedings Volume 6770, Fiber Optic Sensors and Applications V; 677004 (2007) https://doi.org/10.1117/12.735498
Event: Optics East, 2007, Boston, MA, United States

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.

Citation Download Citation

Ines Latka, Wolfgang Ecke, Bernd Höfer, Tobias Habisreuther, and Johannes Peter Kallmeyer "Fiber Bragg grating based measurement of elastic properties at cryogenic temperatures", Proc. SPIE 6770, Fiber Optic Sensors and Applications V, 677004 (19 October 2007); https://doi.org/10.1117/12.735498

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