摘要
介绍了掺镱光纤放大器的基本结构和基本原理及掺镱光纤的特性。由于激发态2F5/2和基态2F7/2的间隔比子能级的间隔大得多,且粒子数在各子能级达到热平衡分布的时间很短,所以用类似EDFA的二能级系统模型来研究YDFA,在二能级系统上建立掺镱光纤放大器模型,并在不考虑ASE的情况下进行了数值模拟,分析了不同泵浦功率下的最佳光纤长度和掺镱光纤放大器的增益谱特性。在此基础上重点介绍了掺镱光纤放大器的设计,并通过试验加以验证。
The basic structure and characteristics of Yb-doped fiber amplifier （YDFA）,and the characteristics of Yb-doped fiber are introduced. Because the separation between the excitated state （^2F5/2） and basic state （^2F7/2） is much longer than that between the sub-levels and the time for the particle population to arrive thermally equalized distribution in each sub-level is very short, YDFA can be studied using two energy-level model which is similar with that used in EDFA, and the YDFA model can be established on the basis of two energy-level system. The numerical simulation of YDFA is carried out in the case of without considering ASE, and the optimal fiber length for various pump powers and the gain characteristics of YDFA are analyzed. On the basis of the above studies the design of YDFA is introduced and their characteristics are verified through testing.
出处
《光纤与电缆及其应用技术》
2008年第3期14-18,共5页
Optical Fiber & Electric Cable and Their Applications
