【摘要】 抽运波长为0.98μm时,考虑合作上转换、交叉弛豫、激发态吸收等上转换机理给出了掺Er及Yb-Er共掺系统的速率方程,并利用二维波导的有限元理论及包含正反向放大的自发辐射的场传输方程,建立了一套分析光波导放大器增益特性的综合理论模型。得到掺Er及Yb-Er共掺Al2O3光波导放大器增益与波导长度、抽运功率、掺杂浓度等多个参量的关系,绘制出具有实用性的优化设计曲线。将该理论模型应用于实际制作的Yb-Er共掺Al2O3光波导放大器,结果与实验数据相符。更多还原

【Abstract】 The rate equations of Er-doped and Yb-Er co-doped systems pumped at 0.98 μm are presented,considering the upconversion mechanisms,such as cooperative upconversion,cross relaxation,and excited state absorption.A multi-theoretical model is founded to analyze the gain characteristic of the waveguide amplifier,by two-dimensional waveguide finite element model and propagation equations with forward and backward amplified spontaneous emission.The dependences of the gain on waveguide length,pump power and doping concentration are obtained.The new theory is used to analyze the gain performance of a practical Yb-Er co-doped Al2O3 waveguide amplifier,and the analyzing results are in accordance with experimental data.更多还原