摘要
采用四能级理论模型对高掺杂碲基EDFA进行了数值模拟,得出C波段和L波段EDFA的主要增益和噪声系数特性,C+L波段同时放大时,20 dB增益带宽达到85 nm.同时分析了铒离子高掺杂带来的上转换效应对放大增益和噪声性能的影响程度,C波段为4%,L波段为10%,当增大泵浦光功率时,影响程度会更小,采用两段级双向泵浦结构放大时影响仅为0.1%.
Numerical simulation on high concentration tellurite EDFA is based on four energy-level model. The main characteristic of gain and noise figure both in C-band and L-band is presented. The bandwidth achieves 85 nm when gain of amplifier both in C-band and L-band achieves above 20 dB. Furthermore, the degradation of gain and noise characteristic caused by the effect of upconversion which is brought by high concentration is analyzed. The degradation is 4% in C-band and 10% in L-band. The degradation is decreasing when the pump power increasing. It is just 0.1% when the two-stage amplifier is bi-directional pumped.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2005年第9期1385-1388,共4页
Acta Photonica Sinica
