摘要
通过数值计算,对反常色散平坦光纤中高阶孤子压缩效应产生超连续谱进行了系统、深入的研究.结果表明,反常色散平坦光纤的色散参量二阶微分常量、峰值色散参量及抽运脉冲的脉宽、孤子阶数对该种光纤中平坦超连续谱的形成及所需光纤长度的选取都有着非常重要的影响;进一步研究表明,超连续谱的展宽机理主要来自脉冲的自相位调制效应和群速度色散的共同作用,高阶非线性效应对超连续谱的产生不起决定性作用,在计算中完全可以忽略.
Supercontinuum generation in anomalous dispersion-flattened fibers through higher-order soliton compression effect is simulated and analyzed in detail. The results show that the second order differential constant of the dispersion parameter, dispersion parameter of the fiber and the pulse width, and peak power of the pump pulse are crucial to flat wideband supercontinuum generation, and the fiber length should also be dissimilarly chosen. It further shows that supercontinuum generation in the fiber mainly results from the interaction of self-phase modulation and group-velocity dispersions, and the higher- order nonlinear effects can be ignored.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第2期717-722,共6页
Acta Physica Sinica
基金
广东省教育厅自然科学基金(批准号:0159)资助的课题.~~
关键词
反常色散平坦光纤
超连续谱
自相位调制效应
群速度色散
anomalous dispersion-flattened fiber, supercontinuum spectrum, self-phase modulation, group-velocity dispersion
