2019/6/3,Optical fiber communications,第三节 EDFA的工作特性,Energy Diagram of Erbium Ions in Silica Glass Er的原子序数为68，原子量167.2，价电子3，属镧系元素。,2019/6/3,Optical fiber communications,A.The discreet states of isolated erbium ions are broadened into bands by inhomogeneous stark splitting. B.The distribution of company within the bands is thermal. C.The net effect is amplification between 1525 and 1570nm,but the gain is not flat.,
