Influence of specific codopants and post-treatments on Erbium Doped fiber: Radiation behavior characterized by CML
Résumé
Research interest in the field of Rare-Earth doped optical fibers is still motivated by practical importance of these specific optical fibers, used as active medium of fiber-lasers and amplifiers designed to operate in radiation environment. Erbium doped fibers for instance, that are suitable for amplification in the 1.5µm window, are very sensitive to ionizing radiations and thus their deployment in numbers of technological applications is at stake. It is therefore crucial to comprehend the mechanisms of material degradation, in order to increase their resistance in radiation environments. The use of a tool combining microscopic and spectroscopic aspects is essential to qualitatively and quantitatively: identify the luminescent centers, attribute them to microscopic structures and to assess the changes induced by radiation in the atomistic scale.