梳状色散光纤中自相似脉冲传输的数值研究  

Numerical study of self-similar pulse transmission in comb-like dispersion fiber

作　　者：江光裕[1] 伏燕军[1] 黄彦[1] 万生鹏[1] 

机构地区：[1]南昌航空大学自动化学院,江西南昌330063

出　　处：《量子电子学报》2009年第5期613-618,共6页Chinese Journal of Quantum Electronics

基　　金：江西省自然科学基金(CA200808025);南昌航空大学航空高校基金资助的课题

摘　　要：从脉冲在光纤中传输所满足的非线性薛定谔方程出发,以双曲渐减的正常色散渐减光纤(ND-DDF)获得线性啁啾自相似脉冲为基础,采用窗口为1550 nm的色散光纤构成梳状色散光纤(CDPF),并给出了相应的理论模型。通过数值模拟的方法研究和分析了脉冲在接近于色散渐减光纤的色散变化趋势的梳状色散光纤中演化成自相似脉冲及其自相似指数变化。结果表明,中心波长为1550 nm的双曲正割脉冲在不同初始能量和初始脉冲宽度的情况下,梳状色散光纤可以产生抛物线型自相似脉冲且具有很好的线性啁啾特性。Based on the nonlinear SchrSdinger equation, pulse propagation in fiber and the linearly chirped parabolic pulse generation by the dispersion decreasing fiber with a normal dispersion （ND-DDF） with a hyperbolic profile, a novel scheme for the generation of the self-similar parabolic pulse by use of a comb-like profiled fiber （CDPF） with normal group-velocity dispersion is proposed. The corresponding numerical model is also presented. In this model, evolution of the self-similar parabolic pulse in the CDPF close to dispersion profile of the DDF is analyzed numerically. The results show that when the hyperbolic-secant-like pulses at 1550 nm have different initial energy and pulse width, the pulse in the CDPF can evolve into a linearly chirped pulse with an exact parabolic intensity profile

关 键 词：非线性光学 梳状色散光纤 自相似脉冲 啁啾 

分 类 号：TN929.11[电子电信—通信与信息系统] O437[电子电信—信息与通信工程]