高阶效应对微结构光纤中超连续谱产生的影响

J4 ›› 2009, Vol. 26 ›› Issue (5): 596-601.

高阶效应对微结构光纤中超连续谱产生的影响

李爱萍刘成周王安全

1滨州学院物理与电子科学系,滨州 256603;
2滨州学院理论物理研究所滨州 256603

出版日期:2009-09-28 发布日期:2009-08-27
通讯作者: 李爱萍(1982-),女，山东青岛人,硕士,现为滨州学院物理与电子科学系专任教师，滨州学院理论物理研究所兼职科研人员。 E-mail:liaiping888@163.com
基金资助:
滨州学院2008年科研基金资助项目(Bzxykj0812)

Influences of higher order effects during supercontinuum generation in a microstructured optical fiber

LI Ai-Ping, LIU Cheng-Zhou, WANG An-Quan

1 Department of Physics, Bin Zhou University, Bin Zhou 256603, China ;
2 Institute for Theoretical Physics, Bin Zhou University Bin Zhou 256603, China

Published:2009-09-28 Online:2009-08-27

摘要/Abstract

摘要：

采用分布傅立叶方法求解了广义非线性薛定谔方程（GNSE），数值模拟了飞秒激光脉冲在微结构光纤中的非线性传输和超连续谱的产生，详细分析了脉冲拉曼散射、自陡峭效应以及三阶色散对超连续光谱产生的影响。分析结果表明：超短脉冲在微结构光纤中传输时出现孤子自频移现象，同时也发现脉冲内拉曼散射和自相位调制的联合作用导致高阶孤子分裂，光谱得到极大展宽，在时域中出现两个滞后的拉曼孤子，三阶色散和自陡效应对光谱的形状影响较小，起着与脉冲内拉曼散射相反的作用，自陡效应比三阶色散效应对光脉冲的影响大一些。

关键词: 非线性光学, 微结构光纤, 分布傅立叶方法, 超连续光谱, 高阶效应

Abstract:

The nonlinear generalized Schrodinger equation has been applied to describe the propagation of femtosecond laser pulses and supercontinuum generation in a microstructured optical fiber, and solved by using the split-step Fourier method. And the role of self-steepening, intra-pulse stimulated Raman scattering(SRS) and third-order dispersion is discussed adequately. The numerical results show that solition self-frequency shift is generated in a microstructured optical fiber. It is also found that intrapulse stimulated Raman scattering and self-phase modulation result in spectral broadening based on the fission of higher order solitions, and two lagging solitions occur in the time domain. The third-order dispersion and self-steepening influence on the shape of spectrum little, having the opposite effects with SRS. Self-steepening has relatively bigger influence on the ultra-short laser pulse than the third-order dispersion.

Key words: nonlinear optics, microstructured optical fiber, split-step Fourier method, super-continuum, higher order effects

李爱萍刘成周王安全. 高阶效应对微结构光纤中超连续谱产生的影响[J]. J4, 2009, 26(5): 596-601.

LI Ai-Ping, LIU Cheng-Zhou, WANG An-Quan. Influences of higher order effects during supercontinuum generation in a microstructured optical fiber[J]. J4, 2009, 26(5): 596-601.

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