TY - JOUR T1 - Analysis of spectroscopic properties of erbium doped Ta< sub> 2 O< sub> 5–Al< sub> 2 O< sub> 3–SiO< sub> 2 optical fiber JF - Journal of non-crystalline solids Y1 - 1999 A1 - Oh, Kyunghwan A1 - Kilian, A A1 - Morse, TF PB - Elsevier VL - 259 ER -