掺镱光纤放大器中自相似脉冲传输特性研究  

Propagation Properties of Self-Similar Pulses in Yb^(+3)-doped Fiber Amplifiers

作　　者：李书贤[1] 徐文成[1] 冯杰[1] 刘颂豪[1] 

机构地区：[1]华南师范大学光子信息技术广东省高校重点实验室,广州510006

出　　处：《光子学报》2008年第10期1937-1941,共5页Acta Photonica Sinica

基　　金：广东省自然科学基金(04010397)资助

摘　　要：研究了高阶色散和增益色散影响下,自相似脉冲在掺镱光纤放大器中的传输特性.从解析求解和数值模拟两方面分别阐述了初始脉冲能量、三阶色散和偶极子驰豫时间对脉冲传输质量的影响.结果表明,当传输考虑三阶色散效应时,伴随着脉冲啁啾非线性区域的扩大,啁啾中心随着色散系数取值的大小和正负前、后移动,脉冲峰向一侧延迟,中心位置发生漂移.增益色散对脉冲放大起到滤波作用,对自相似脉冲具有压窄效应.证实了具有一定驰豫时间的增益介质能够维持自相似孤子波的稳定传输.Self-similar pulse propagation properties in Yb^＋3-doped fiber amplifiers with the effects of higher order dispersion and gain dispersion were studied. The effects of initial pulse energy,third-order dispersion and the doped ions dipole relaxation time on the pulse propagation quality were relatively expounded with the analytical and simulative methods. It is shown that with nonlinear area of parabolic pulses being enlarged,the center of chirp moves forward or backward, due to the difference of third-order dispersion coefficient. And the figure Of pulses is distorted with the pulse peak delaying to one side and the center location excursing. Gain dispersion can be a filter, which can properly compress pulse-width. Results proved the possibility of the self-similar pulse existing m gain medium with a certain relaxation time.

关 键 词：非线性光学 光纤放大器 自相似脉冲 三阶色散 增益色散 

分 类 号：TN25[电子电信—物理电子学]