%0 Journal Article %J Journal of non-crystalline solids %D 1999 %T Analysis of spectroscopic properties of erbium doped Ta 2 O 5–Al 2 O 3–SiO 2 optical fiber %A Oh, Kyunghwan %A Pettit, Erin %A Kilian, A %A Morse, TF %B Journal of non-crystalline solids %I North-Holland %V 259 %P 10–15 %G eng