Journal
OPTICS EXPRESS
Volume 18, Issue 19, Pages 20455-20460Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.020455
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Ytterbium doped fiber lasers are known to be impacted by the creation of color centers during lasing so called photodarkening. This defect creation was investigated in a spectroscopic point of view, showing the presence of thulium traces (ppb) in the ytterbium doped fiber. Moreover, this contamination exhibit luminescence in the UV range under 976 nm excitation of the ytterbium-doped fiber. In adding more thulium to an ytterbium-doped fiber it was shown that thulium strongly impact the defects creation process, involved in photodarkening. (C) 2010 Optical Society of America
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