Long-term stable sapphire fiber Bragg grating sensors at 1400°C

T. Habisreuther; T. Elsman; Z. Pan; A. Graf; P. Ahonen; K. Grujic; S. Simonsen; H. Mathisen; R. Norheim; R. Willsch; M. Schmidt

doi:10.1117/12.2059313

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2 June 2014 Long-term stable sapphire fiber Bragg grating sensors at 1400°C

T. Habisreuther, T. Elsman, Z. Pan, A. Graf, P. Ahonen, K. Grujic, S. Simonsen, H. Mathisen, R. Norheim, R. Willsch, M. Schmidt

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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915719 (2014) https://doi.org/10.1117/12.2059313
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

We tested the long term stability of first order Sapphire Fiber Bragg gratings (SFBG) at 1400°C for a period of 28 days in air. During the whole period temperatures detected by the SFBG differed less than ±2K°C from the temperatures measured by a type B thermocouple. The spectra at the beginning and the end of the installation were identical. The reliable practical application of wavelength-multiplexed two-grating SFBG arrays for quasi-distributed sensing at very high temperatures has been demonstrated.

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T. Habisreuther, T. Elsman, Z. Pan, A. Graf, P. Ahonen, K. Grujic, S. Simonsen, H. Mathisen, R. Norheim, R. Willsch, and M. Schmidt "Long-term stable sapphire fiber Bragg grating sensors at 1400°C", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915719 (2 June 2014); https://doi.org/10.1117/12.2059313

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