| Autor: |
H. Bartelt, S. Grimm, J. Ommer, C. Chojetzki |
| Rok vydání: |
2004 |
| Předmět: |
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| Zdroj: |
Electronics Letters. 40:1576 |
| ISSN: |
0013-5194 |
| DOI: |
10.1049/el:20047193 |
| Popis: |
Fibre Bragg gratings (FBGs) of a new IA type have been reported to show thermal behaviour that is different from that of conventional type I gratings. Given a sufficiently large temperature coefficient difference between the two grating types, a dual-grating sensor formed by both types of gratings could allow simultaneous temperature and strain measurement. Such dual-grating sensors were prepared for the 830 nm wavelength region and tested at temperatures of up to 300°C. As far as the variation of the different temperature coefficients is concerned, the temperature coefficient of type IA FBGs and the temperature coefficient of type I FBGs have been found to converge as the temperature increases. The difference in temperature coefficients drops to 1% after annealing at 300°C. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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