Revisiting literature observations on photodarkening in Yb3+doped fiber considering the possible presence of Tm impurities

Romain Peretti, Cedric Gonnet, Anne-Marie Jurdyc

Ytterbium (Yb) doped fiber lasers are known to be affected by the creation of color centers during lasing (socalled photodarkening (PD)). In a previous work, this defect creation w…