双折射光子晶体光纤中基于孤子分裂的超连续光谱产生  

Supercontinuum generation based on fission of higher-order solitons in bi-refringent photonic crystal fibers

作　　者：季玲玲[1,2] 陈伟[2] 曹迎春[2] 杨振宇[2] 陆培祥[2] 

机构地区：[1]武汉科技大学应用物理系,武汉430081 [2]华中科技大学光电科学与工程学院,武汉430074

出　　处：《物理学报》2009年第8期5462-5466,共5页Acta Physica Sinica

基　　金：高等学校博士学科点专项科研基金(批准号:20040487023);国家重点基础研究发展计划(批准号:2006CB606006) ~~

摘　　要：利用亚纳焦量级、脉冲宽度为100fs的激光脉冲在双折射光子晶体光纤中获得了450—1050nm的超连续光谱,且超连续光谱具有明显的分立峰状结构.分析了光谱中分立峰状结构产生的物理机制,抽运光波长处于接近零色散波长的反常色散区,形成高阶光孤子,由于高阶非线性和高阶色散的影响,高阶孤子分裂成多个基孤子,使初始光谱上演化出红移的光孤子成分和蓝移的色散波成分.理论模拟了飞秒激光脉冲在光纤中的色散特性和传输特性,较好地解释了实验结果.The nonlinear propagation of 100 fs Ti： sapphire laser pulses in a bi-refringent photonic crystal fiber is experimentally investigated. Super-continuum generation with spectra extending from 450--1050 nm was obtained and the spectra consist of distinct peaks. The spectral broadening is shown to be caused by the mechanism of spectral broadening through fission of higher- order solitons into red-shifted fundamental solitons and blue-shifted dispersion waves. The simulation of light propagation property in the waveguide can explain well the experimental resuhs.

关 键 词：光子晶体光纤 超连续光谱产生 孤子分裂 脉冲俘获 

分 类 号：TN253[电子电信—物理电子学] TN241