%0 Journal Article %T Investigation of Er-doped glasses by two-step hydrolysis with N,N-dimethyl formamide %A Fran, Yui-Shin %J Proceedings of SPIE %V 2288 %N 1 %P 652-665 %@ 0277-786X %D 1994-10-13 %I SPIE %~ DeepDyve