- Preventing photodarkening in ytterbium-doped high power fiber lasers; correlation to the UV-transparency of the core glassM Engholm
Department of Information, Technology and Media, Physical Electronics and Photonics, Mid Sweden University, SE 851 70 Sundsvall, Sweden
Opt Express 16:1260-8. 2008..Very low levels of photodarkening is observed for the ytterbium doped phosphosilicate glass composition under 915nm high power diode pumping. Possible excitation routes to reach the CT-absorption band under 915nm pumping are discussed...
- Experimental evidence for the formation of divalent ytterbium in the photodarkening process of Yb-doped fiber lasersS Rydberg
Mid Sweden University, S 851 70 Sundsvall, Sweden
Opt Express 21:6681-8. 2013..A concentration decrease in Yb(3+) 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...