ABSTRACT In this work, the energy levels, transition configuration and numerical model of cobalt ion-doped fiber is proposed and analyzed. A three-level system is employed to model the amplified spontaneous emission (ASE) of the doped fiber pumped at 550 nm, and the rate and power propagation equations are solved to analyze the effect of fiber length, active ion concentration, pump power and temperature on the ASE. It is shown that the fiber has an ultra-broadband ASE in 1100-1900 nm range, which will be promising for fiber communication system, fiber sensor and medical imaging. GRAPHICAL ABSTRACT

中文翻译：

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在 550 nm 泵浦的二价钴离子掺杂光纤的 800 nm 带宽放大自发射

摘要 在这项工作中，提出并分析了钴离子掺杂光纤的能级、跃迁构型和数值模型。采用三级系统对550 nm泵浦掺杂光纤的放大自发辐射(ASE)进行建模，求解速率和功率传播方程，分析光纤长度、活性离子浓度、泵浦功率和温度的影响在 ASE 上。结果表明，该光纤在1100-1900 nm范围内具有超宽带ASE，将有望用于光纤通信系统、光纤传感器和医学成像。图形概要