| Numéro |
J. Phys. Colloques
Volume 46, Numéro C8, Décembre 1985
Third International Conference on the Structure of Non-Crystalline Materials
|
|
|---|---|---|
| Page(s) | C8-651 - C8-655 | |
| DOI | https://doi.org/10.1051/jphyscol:19858105 | |
J. Phys. Colloques 46 (1985) C8-651-C8-655
DOI: 10.1051/jphyscol:19858105
INTRINSIC AND PHOTON-INDUCED DEFECTS ASSOCIATED WITH Ge IN OPTICAL FIBER
H. Kawazoe1, M. Yamane1 and Y. Watanabe21 Department of Inorganic Materials, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152, Japan
2 Department of Industrial Chemistry, Tokyo Metropolitan University, Fukasawa, Setagaya-ku, Tokyo 158, Japan
Résumé
Les mesures de champ hyperfin sur le Ge73 ont montré que les défauts d'irradiation induits dans des fibres de silice dopées au germanium sont bien du type E' (30 %) et tétraèdrique (35 %). La relaxation thermique des fibres irradiées permet de suggérer que la formation de groupement OH par diffusion de l'hydrogène atmosphérique est une réaction catalysée par les défauts E'.
Abstract
Structural models for darwing- and radiation-induced defects associated with Ge were confirmed to be E' type and spherical tetrahedron from the spin density on Ge, 30% and 35%, respectively, estimated from hfs due to 73Ge. From the observation of thermal relaxation of radiation-induced center to Ge-E', the loss-increase due to OH formed on the reaction of a fiber with hydrogen molecule diffused from atmosphere was explained as the E'-catalyzed formation of OH groups.