Revisiting twin-core fiber sensors for high-temperature measurements
2012 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 51, no 25, 6227-6232 p.Article in journal (Refereed) Published
A twin-core fiber Michelson interferometer is evaluated as a high-temperature sensor. Although linear and reproducible operation up to 300°C is obtained, at higher temperatures (700°C) the refractive index shifts plastically and hysteresis is observed, rendering an untreated sensor head unusable. The shift is shown to be greatly reduced by an annealing process of the fiber for 10 h at 900°C, with which the linear response is preserved.
Place, publisher, year, edition, pages
2012. Vol. 51, no 25, 6227-6232 p.
Refractive-Index, Optical-Fibers, Bragg Gratings, Interferometer
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-101904DOI: 10.1364/AO.51.006227ISI: 000308595500035ScopusID: 2-s2.0-84866329881OAI: oai:DiVA.org:kth-101904DiVA: diva2:549812
FunderSwedish Research Council
QC 201209122012-09-052012-09-052013-02-26Bibliographically approved