数值模拟亚纳秒脉冲产生超连续谱的一种改进方法(英文)  

An Improved Simulation Method of Supercontinuum Generated by Sub-nanosecond Pulse

作　　者：方平[1,2] 杨直[1] 王屹山[1] 赵卫[1] 张挺[1,2] 李成[1] 段作梁[1] 段开椋[1] 

机构地区：[1]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,西安710119 [2]中国科学院研究生院,北京100049

出　　处：《光子学报》2010年第1期16-20,共5页Acta Photonica Sinica

基　　金：Supported by National Natural Science Foundation of China(60537060)

摘　　要：提出了一种基于分步傅里叶方法的二次采样法,用以模拟和分析亚纳秒脉冲泵浦光子晶体光纤产生的超连续谱特性。通过此方法在广义非线性薛定谔方程上的应用,在超连续谱模拟中显著缩短了运算时间,模拟结果与实验符合很好。同时还对模拟光谱与实验结果间的细微差别做了讨论。通过此方法,模拟了1.8m晶体光纤中产生的1.15 W续谱和光谱沿光纤长度的演化,为超连续谱实验研究的优化设计提供了依据。In this paper, a method of twice sampling based on split step Fourier method was developed to analyze and simulate the supercontinuum generation in photonic crystal fiber pumped by sub-nanosecond laser pulse. Applying this method to generalized nonlinear Schrodinger equation, much operation time was saved in Supercontinuum simulation, and the simulated spectrum agrees well with the experimental result under the same conditions. Also, the slight dissimilarities between the simulated spectrum and the experimental one were discussed. The simulated supercontinuum with 1.15W power generated in 1.8m Photonic Crystal Fiber and the evolution of spectrum by our work can give reference for improving further experiment setup.

关 键 词：超连续谱 二次采样法 分步傅里叶方法 亚纳秒脉冲 

分 类 号：TN25[电子电信—物理电子学]