title: Post-hydrogen-loaded draw tower fiber Bragg gratings and their thermal regeneration.
abstract: The idea of Bragg gratings generated during the drawing process of a fiber dates back almost 20 years. The technical improvement of the draw tower grating (DTG) process today results in highly reliable and cost-effective Bragg gratings for versatile application in the optical fiber sensor market. Because of 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 of about 300 °C. To increase temperature stability, we combined DTG arrays with hydrogen postloading and a thermal regeneration process that enables their use in high-temperature environments. The regenerated draw tower gratings are demonstrated to be suitable for temperatures of more than 800 °C.
authors.affiliation: Institute of Photonic Technology (IPHT), Albert Einstein Street 9, 07745 Jena, Germany. eric.lindner@ipht‐jena.de
authors.forename: Eric
authors.initials: E
authors.lastname: Lindner
authors.forename: John
authors.initials: J
authors.lastname: Canning
authors.forename: Christoph
authors.initials: C
authors.lastname: Chojetzki
authors.forename: Sven
authors.initials: S
authors.lastname: Brückner
authors.forename: Martin
authors.initials: M
authors.lastname: Becker
authors.forename: Manfred
authors.initials: M
authors.lastname: Rothhardt
authors.forename: Hartmut
authors.initials: H
authors.lastname: Bartelt