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高非线性光子晶体光纤中飞秒脉冲的传输特性和超连续谱产生机制的实验研究及模拟分析
引用本文:贾亚青,闫培光,吕可诚,张铁群,朱晓农.高非线性光子晶体光纤中飞秒脉冲的传输特性和超连续谱产生机制的实验研究及模拟分析[J].物理学报,2006,55(4):1809-1814.
作者姓名:贾亚青  闫培光  吕可诚  张铁群  朱晓农
作者单位:(1)南开大学物理科学学院,天津 300071; (2)南开大学现代光学研究所,光电信息技术科学教育部重点实验室,天津 300071
基金项目:科技部科研项目;中国科学院资助项目;教育部重点实验室基金
摘    要:用实验和数值模拟两种方法研究了高非线性光子晶体光纤中飞秒激光脉冲的传输特性和超连续谱的产生机理,给出了抽运脉冲在三种不同中心波长情况下输出光谱展宽并形成超连续谱的实际测量及理论模拟结果.研究表明:在零色散波长抽运时,光谱展宽以自相位调制为主,同时三阶色散的影响明显,传输脉冲在时域内出现振荡次峰.而在反常色散区抽运时,光谱展宽的初期以自相位调制为主,随后根据抽运功率的不同孤子自频移、高阶光孤子的裂变和四波混频效应会逐渐增强,进而成为光谱展宽的主要原因.与此相应,在时域中能明显看到孤子的形成和红移,飞秒传输脉 关键词: 光子晶体光纤 高非线性光子晶体光纤 飞秒脉冲激光 超连续谱

关 键 词:光子晶体光纤  高非线性光子晶体光纤  飞秒脉冲激光  超连续谱
收稿时间:6/1/2005 12:00:00 AM
修稿时间:2005-06-012005-10-28

Experimental study and numerical analysis of femtosecond pulse propagation and supercontinuum generation in highly nonlinear photonic crystal fiber
Jian Ya-Qing,Yan Pei-Guang,Lü Ke-Cheng,Zhang Tie-Qun,Zhu Xiao-Nong.Experimental study and numerical analysis of femtosecond pulse propagation and supercontinuum generation in highly nonlinear photonic crystal fiber[J].Acta Physica Sinica,2006,55(4):1809-1814.
Authors:Jian Ya-Qing  Yan Pei-Guang  Lü Ke-Cheng  Zhang Tie-Qun  Zhu Xiao-Nong
Institution:1. Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education, Institute of Modem Optics, Nankai University, Tianjin 300071, China; 2. Institute of Physics, Nankai University, Tianjin 300071, China
Abstract:Femtosecond laser pulse propagation and supercontinuum generation in a highly nonlinear photonic crystal fiber is investigated experimentally and numerically. Consistent results of continuum generation measured and calculated for 790, 800, and 820 nm pump wavelengths are presented. It is shown that when the pump wavelength overlaps with the zero-dispersion wavelength self-phase modulation and third-order dispersion play an important role, and the oscillation structure appears in the temporal waveform of the propagating pulses, whereas in anomalous dispersion region, the formation and the red-shift of solitons are evident, and the self phase modulation plays a dominant role only in the initial stage. Further spectral broadening is due to solitons self-frequency shift, fission of higher-order solitons and four-wave mixing. It is also found that four-wave mixing occurs more easily in anomalous dispersion region than at the zero-dispersion wavelength.
Keywords:photonic crystal fiber  highly nonlinear photonic crystal fiber  femtosecond pulse laser  supercontinuum
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