Processing and characterization of new passive and active oxysulfide glasses in the Ge-Ga-Sb-S-O system
Abbreviated Journal Title
J. Solid State Chem.
Oxysulfide; Raman spectroscopy; Erbium; Luminescence properties; Laser; irradiation; Photo-sensitivity; OPTICAL-FIBER AMPLIFIERS; CHALCOGENIDE GLASSES; PHOTO-RESPONSE; FILMS; Chemistry, Inorganic & Nuclear; Chemistry, Physical
New passive and active oxysulfide glasses have been prepared in the Ge-Ga-Sb-S-O system employing a two-step melting process which involves the processing of the chalcogenide glass (ChG) and its subsequent melting with amorphous GeO(2) or Sb(2)O(3) powder. Optical characterization of the oxysulfide glasses has shown that the UV cut-off wavelength decreases with increasing oxygen content. Using Raman spectroscopy, correlations have been made between the formation of new Ge- and Sb-based oxysulfide structural units, the Sb content and the O/S ratio. We demonstrate the successful processing of active rare earth doped oxysulfide glasses by melting the chalcogenide glass with Er(2)O(3) and Sb(2)O(3) and also by melting the Er(3+) doped chalcogenide glass with Sb(2)O(3). Modification of the emission spectra at 1500 nm of Er(3+) doped samples with the introduction of oxygen revealed that Er(3+) most likely exists in dual O- and S-neighbor environments. Finally, the photo-response of these new glasses upon near-IR femtosecond laser irradiation has been investigated as a function of Sb content and O/S ratio and shows that the glasses are photo-sensitive to NIR fs laser light with the magnitude of the photo-sensitivity dependent on the glass' Sb content and O/S ratio. (C) 2009 Elsevier Inc. All rights reserved.
Journal of Solid State Chemistry
"Processing and characterization of new passive and active oxysulfide glasses in the Ge-Ga-Sb-S-O system" (2009). Faculty Bibliography 2000s. 1999.