17 May 2011 Regenerated draw tower grating (DTG) temperature sensors
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Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77536M (2011) https://doi.org/10.1117/12.884645
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada
Abstract
The idea of Bragg gratings, generated during the drawing process of a fiber dated back almost 20 years ago. The technical improvement of the DTG process results today in high reliable and cost effective Bragg gratings for versatile application in the optical fiber sensor market. Due to the single pulse exposure of the fiber, the gratings behave typically like type I gratings with respect to their temperature stability. This means that such gratings only work up to temperatures lower than 300 °C. To increase temperature stability we combined DTG arrays with hydrogen loading and a thermal regeneration process which enables their use in high temperature environment. The regenerated draw tower gratings are suitable for temperatures up to 900°C.
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Eric Lindner, Eric Lindner, John Canning, John Canning, Christoph Chojetzki, Christoph Chojetzki, Sven Brückner, Sven Brückner, Martin Becker, Martin Becker, Manfred Rothhardt, Manfred Rothhardt, Hartmut Bartelt, Hartmut Bartelt, } "Regenerated draw tower grating (DTG) temperature sensors", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77536M (17 May 2011); doi: 10.1117/12.884645; https://doi.org/10.1117/12.884645
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