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

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

Author Affiliations +

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.

Citation Download Citation

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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