title: Thermal regeneration of fiber Bragg gratings in photosensitive fibers.
abstract: We report about a thermal regeneration of fiber Bragg gratings written in photosensitive fibers with nanosecond laser pulses. We observe a regenerative process in a highly photosensitive fiber without hydrogen loading which indicates a secondary grating growth in an optical fiber by thermal activation. This process is more temperature stable than the commonly known gratings produced by color center modifications. The writing conditions of such new type of gratings are investigated and the temperature behavior of these regenerated fiber Bragg gratings is analyzed. The application possibilities are in the field of high temperature sensor systems by making use of the combination of good spectral shape of a Type I grating with a Type II like temperature stability.
authors: Institute of Photonic Technology, Albert Einstein Street 9, 07745 Jena Germany. eric.lindner@ipht-jena.de
authors: Eric
authors: E
authors: Lindner
authors: Christoph
authors: C
authors: Chojetzki
authors: Sven
authors: S
authors: Brückner
authors: Martin
authors: M
authors: Becker
authors: Manfred
authors: M
authors: Rothhardt
authors: Hartmut
authors: H
authors: Bartelt