Radiation-induced effects in silica-based glasses: experimental and theoretical results

Abstract : We present our methodology to study the radiation- induced effects in silica-based glasses. Our approach is based on the conjoint development of canonical samples of preforms and optical fibers and ab initio tools. The composition of the experiment samples corresponds to those of the glass reproduced with the large supercells used for our ab initio calculations. In this abstract, we give preliminary results concerning the role of Germanium in the radiation-sensitivity of silica-based glasses.