Filters

2019 - 201912020 - 20211

More filters

2020 - 20212
Reset filters

Settings

Author: Wondraczek, Katrin × Subject: fibers ×

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Two-Step-Model of Photosensitivity in Cerium-doped Fibers
    (Washington D.C. : Optical Society of America, 2019) Elsmann, Tino; Becker, Martin; Olusoji, Olugbenga; Unger, Sonja; Wondraczek, Katrin; Aichele, Claudia; Lindner, Florian; Schwuchow, Anka; Nold, Johannes; Rothhardt, Manfred
    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.
  • Thumbnail Image
    Item
    Extruded suspended core fibers from lanthanum-aluminum-silicate glass
    (Washington, DC : OSA, 2021) Litzkendorf, Doris; Matthes, Anne; Schwuchow, Anka; Dellith, Jan; Wondraczek, Katrin; Ebendorff-Heidepriem, Heike
    We report the use of the extrusion technique at highest temperatures to date (975 °C-1000 °C) for the fabrication of suspended core fibers (SCFs) from glass with molar composition 65 SiO2-20 Al2O3-15 La2O3 (SAL65). Through adjusting die design and fabrication conditions, extruded preforms for fibers with two different core sizes (1.2 µm and 3.1 µm) were successfully produced. Cross-sectional microstructure and material loss of these fibers highlight the potential of the extrusion technique for fabrication of microstructured optical fibers from glasses with high softening temperature and thus high thermal and mechanical stability. © 2020. All rights reserved.