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Proceedings Paper

Advanced fabrication and calibration of high-temperature sensor elements based on sapphire fiber Bragg gratings
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Paper Abstract

In this paper, improved fabrication and calibration techniques of Fiber Bragg Gratings (FBG) for very high temperature sensing applications up to more than 1500 °C will be presented. The fibers used are single crystalline sapphire fibers, which are applicable in such high temperature ranges due to their high melting point at 2040 °C and their extreme thermal stability. The inscription of the FBGs was performed by the second harmonic wave of a Ti:Sa-femtosecond laser system. With pulses of 400 nm wavelength first order gratings could be achieved. Using a two-beam phase mask interferometer, grating arrays within a wide spectral range have been fabricated with only one phase mask and without additional calibration routine. The inscribed grating arrays were wavelength-calibrated using a reference FBG, and their temperature sensitivity was evaluated.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91572N (2 June 2014); doi: 10.1117/12.2059182
Show Author Affiliations
Tino Elsmann, Institut für Photonische Technologien e.V. (Germany)
Tobias Habisreuther, Institut für Photonische Technologien e.V. (Germany)
Manfred Rothhardt, Institut für Photonische Technologien e.V. (Germany)
Reinhardt Willsch, Institut für Photonische Technologien e.V. (Germany)
Hartmut Bartelt, Institut für Photonische Technologien e.V. (Germany)


Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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