Experimental evidence for the formation of divalent Ytterbium in the photodarkening process of Yb-doped fiber lasers
2013 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 21, no 6, 6681-6688 p.Article in journal (Refereed) Published
In this work we present experimental evidence that the valence instability of the ytterbium ion play a key role for the observed photodarkening mechanism in Yb-doped fiber lasers. Luminescence and excitation spectroscopy performed on UV irradiated Yb/Al doped silica glass preforms and near-infrared diode pumped photodarkened fibers show a concentration increase of Yb2+ ions. A concentration decrease in Yb3+ could also be observed for the UV irradiated preform. The findings contribute to an increased understanding of the kinetic processes related to photodarkening in Yb-doped high power fiber lasers.
Place, publisher, year, edition, pages
2013. Vol. 21, no 6, 6681-6688 p.
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:miun:diva-18686DOI: 10.1364/OE.21.006681ISI: 000316796000004ScopusID: 2-s2.0-84875757012Local ID: STCOAI: oai:DiVA.org:miun-18686DiVA: diva2:614291