首页 | 本学科首页   官方微博 | 高级检索  
     检索      

飞秒脉冲在硅波导中产生超连续谱的研究
引用本文:乔丽,冯鸣,刘组学,孟婕,吕可诚.飞秒脉冲在硅波导中产生超连续谱的研究[J].物理学报,2011,60(10):100504-100504.
作者姓名:乔丽  冯鸣  刘组学  孟婕  吕可诚
作者单位:南开大学物理学院,弱光非线性光子学教育部重点实验室,天津 300071
基金项目:国家自然科学基金(批准号:60708001) 和高等学校博士点基金新教师项目(批准号:20070055082) 资助的课题.
摘    要:利用非线性薛定谔方程对飞秒脉冲在硅波导中的传输以及超连续谱的产生进行了研究,计算和分析了色散参量及非线性损耗在超连续谱的产生过程中的影响.结果表明,孤子分裂是飞秒脉冲在硅波导中产生超连续谱的主要机理.飞秒脉冲中心波长与波导零色散点的相对位置对超连续谱的产生有极大影响.当中心波长位于近零色散点的反常色散区时,孤子分裂现象最明显,谱宽远大于在零色散波长及正常色散处入射时的情况,并且达到稳定展宽所需波导长度最短.其次,高阶色散的大小也会影响光谱展宽,三阶色散绝对值较小时,能够获得较大的展宽.另外,由于双光子吸收效应带来大量损耗,限制了谱宽,并且随着初始脉冲功率的逐渐增大,展宽出现饱和现象. 关键词: 超连续谱 孤子分裂 色散 硅波导

关 键 词:超连续谱  孤子分裂  色散  硅波导
收稿时间:2010-11-02

Nonlinear propagation and supercontinuum generation of a femtosecond pulse in silicon waveguide
Qiao Li,Feng Ming,Liu Zu-Xue,Meng Jie,Lü Ke-Cheng.Nonlinear propagation and supercontinuum generation of a femtosecond pulse in silicon waveguide[J].Acta Physica Sinica,2011,60(10):100504-100504.
Authors:Qiao Li  Feng Ming  Liu Zu-Xue  Meng Jie  Lü Ke-Cheng
Institution:The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics, Nankai University, Tianjin 300071, China;The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics, Nankai University, Tianjin 300071, China;The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics, Nankai University, Tianjin 300071, China;The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics, Nankai University, Tianjin 300071, China;The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics, Nankai University, Tianjin 300071, China
Abstract:Propagation of femtosecond pulse and supercontinuum generation in silicon waveguide are investigated numerically by solving the generalized nonlinear Schrödinger equation. The effects of dispersive effect and nonlinear loss on supercontinuum generation are simulated and analyzed. It is found that soliton fission is the main mechanism of supercontinuum generation in silicon waveguide. The relative position between the central wavelength of femtosecond pulse and zero-dispersive wavelength (ZDW) of silicon waveguide significantly affects the generation of supercontinuum. When the input pulse falls in the anomalous dispersion regime, soliton fission phenomenon is most obvious. It is also found that the high-order dispersion plays an important role in supercontinuum generation. When the absolute value of third-order dispersion is smaller, a broader supercontinuum can be obtained. Besides, two-photon absorption (TPA) effect in silicon induces high loss, and reduces the spectral width of the supercontinuum.
Keywords:supercontinuum  soliton fission  dispersive effect  silicon waveguide
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《物理学报》浏览原始摘要信息
点击此处可从《物理学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号