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Two-step-model of photosensitivity in cerium-doped fibers

: Elsmann, T.; Becker, M.; Olusoji, O.; Unger, S.; Wondraczek, K.; Aichele, C.; Lindner, F.; Schwuchow, A.; Nold, J.; Rothhardt, M.

Volltext ()

Optical Materials Express 9 (2019), Nr.4, S.1654-1666
ISSN: 2159-3930
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IOF ()

The photosensitivity of various cerium-doped fibers has been experimentally investigated for both excimer- and femtosecond-laser illumination. The results of single-pulse, few-pulse and multi-pulse inscription of fiber-Bragg-gratings with both laser systems and the thermal aging of those gratings demonstrated the restrictions of the conventional color center model for cerium-doped fibers. To explain the short-term stability of single-pulse gratings against long-term stability of multi-pulse gratings, an extension into a two-step-model was deduced.