掺铒光纤放大器中上转换过程的影响  

The effect of upconversion on erbium-doped fiber amplifiers (EDFA)

作　　者：廖毅[1] 牛嗣亮[1] 胡永明[1] 孟洲[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,长沙410073

出　　处：《光学技术》2006年第z1期50-52,共3页Optical Technique

摘　　要：掺杂浓度的提高影响了掺铒光纤放大器(EDFA)的性能,对经典Giles模型提出了新的要求。首先研究了高掺杂下铒离子距离较小引起的上转换过程的机理,通过优化速率方程模型分析了上转换过程对EDFA的影响,得出了在泵浦光和信号光远远大于ASE光的假设下泵浦光和信号光沿光纤长度变化的近似表达式,并将该近似分析解与解析解进行了比较。仿真结果表明上转换过程会降低随光纤传输的信号光和泵浦光,影响EDFA的放大性能,并得出了当掺铒浓度大于2.95×1025m-3时,上转换过程的影响不能忽略的结论。Erbium-doped fiber amplifier(EDFA)efficiency strongly depends on erbium concentration.Highly doped erbium devices show degraded performance when compared with low concentration ones.The mechanism of upconversion is studied and the effect of it on the performance of an EDFA is analyzed numerically,by means of a set of rate equations model.Approximate analytical solutions,for the rate equations,which include the effect of the upconversion,are presented,when the amplified spontaneous emission can be neglected,compared to the pump and signal powers.Results show that the pump and signal powers all bear degradation due to upconversion.,and the effect can't be neglected when the Er3+ concentration is larger than 2.95×1025 m-3.

关 键 词：光纤通信技术 上转换效应 速率方程模型 掺铒光纤放大器 

分 类 号：TN929[电子电信—通信与信息系统]