凸型色散分布光纤产生超宽超连续谱的研究  

Ultra-wideband Supercontinuum Generation in a Fiber with Convex Dispersion Profile

作　　者：陈泳竹[1,2] 余志强[2] 

机构地区：[1]广东技术师范学院广东省高校数控技术重点实验室,广州510635 [2]中山大学光电材料国家重点实验室,广州510275

出　　处：《半导体光电》2009年第2期268-272,共5页Semiconductor Optoelectronics

基　　金：国家重点基础研究特别基金项目(G2004CB719805);国家自然科学基金项目(60677051);广东省自然科学基金项目(8151063301000004)

摘　　要：提出了色散渐减光纤的一种新型色散分布模型。从频域的全场方程出发,利用数值计算对该种光纤中超连续谱的产生进行了比较深入的分析和研究。研究表明,该种光纤相比常规色散平坦渐减光纤可以产生更宽的平坦、超宽超连续谱,其平坦谱宽可达1000 nm以上。进一步研究表明,超连续谱的形成主要源自于光纤的自相位调制和各阶群速度色散的共同作用,同时自陡峭、受激拉曼散射等高阶非线性效应对超连续谱的形成也有着非常重要的影响。Supercontinuum generation in dispersion decreasing fiber, with different dispersion profile from general dispersion-flattened/decreasing fiber, has been analyzed and studied in detail, by utilizing numerical simulation based on the total field formulation in the frequency domain. It is found that this scheme can gengerate wider flat ultra-broadened supercontinuum and the flat bandwidth can be up to 1000 nm. It is further found that the effects of group-velocity dispersion and self-phase modulation are the primary factors for the supercontinuum generation, and higher-order nonlinear effects such as self-steepening and stimulated Raman scattering also play an important role in the generation of supereontinuum spectrum.

关 键 词：非线性光纤光学 色散平坦渐减光纤 频域全场方程 超连续谱 高阶群速度色散 

分 类 号：TN929.11[电子电信—通信与信息系统]