RAYBIUM is a supplier of rare-earth (RE) doped fibers for fiber laser applications. Our core competence is development of high performance RE-doped silica fibers for e.g. OEM integration. RAYBIUM now offers a new type of ytterbium doped silica fibers meeting high demands on efficiency and reliability (high photodarkening resistance). The fibers are available in several standard dimensions including both PM- and non-PM versions.