POVZETEK - Erbijeva vlakna se že več desetletij uporabljajo za ojačevalnike v telekomunikacijah. Čeprav sodijo med specialna vlakna, so v tem smislu že komercialna stalnica z daljšo tradicijo. Kljub temu so tehnologije za njihovo proizvodnjo različne, kar prinaša tudi različnost izzivov pri njihovem razvoju. Lumentum d.o.o. ima lastno razvito tehnologijo za dopiranje kvarčnih stekel in je po začetnem fokusu na razvoj iterbijevih laserskih vlaken zakorakal tudi v razvoj erbijevih vlaken. Ta prispevek je namenjen orisu procesa razvoja in izdelave erbijevih vlaken ter nekaterih izzivov, ki ta razvoj spremljajo.

ABSTRACT - Ebium doped fibers have been in use in telecom amplifiers for many decades. Although they are classified as specialty fibers, they are in this sense an off the shelf product with a longer tradition. Despite this, there are different existing fabrication technologies in use which yield different types of challenges when developing the fibers. Lumentum d.o.o. developed its own proprietary technology for doping quartz glass and after initially focussing on ytterbium doped laser fiber development stepped into erbium doped fiber development too. This aricle aims at illustrating the development process and fabrication process of erbium doped fibers and a few challenges related to this development.