离散效应对光子晶体光纤中飞秒脉冲压缩影响

赵荣霞; 李爱萍

doi:10.3969/j.issn.1001-3806.2011.05.009

离散效应对光子晶体光纤中飞秒脉冲压缩影响

赵荣霞¹,
李爱萍^1,2

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

作者简介: 赵荣霞(1980-)，女，硕士，助教，主要从事宇宙线物理和光子晶体光纤非线性特性的应用研究。Email:zhaorxbzxy@163.com.

基金项目:
滨州学院科研基金资助项目(Bzxykj0812)
中图分类号: TN929.11

Effect of pulse walk-off on femtosecond pulse compression in photonic crystal fibers

ZHAO Rong-xia¹,
LI Ai-ping^1,2

1.
Department of Physics, Binzhou University, Binzhou 25663, China;
2.
Institute for Theoretical Physics, Binzhou University, Binzhou 256603, China
CLC number: TN929.11

摘要: 为了研究离散效应对光子晶体光纤中飞秒信号脉冲压缩的影响,采用分步傅里叶方法数值求解耦合的非线性薛定谔方程,模拟了双飞秒脉冲在光子晶体光纤中的非线性传输过程;计算和分析了离散效应和非同步耦合对信号脉冲压缩的影响。结果表明,当抽运脉冲在反常色散区进行抽运,而信号脉冲在正常色散区入射时,在群速度色散、3阶色散,自相位调制及交叉相位调制联合作用下,信号脉冲在传输过程中不仅被压缩且存在最佳光纤长度;离散效应导致信号脉冲压缩因子减小,所需最佳光纤长度增加以及压缩后的脉冲频谱呈现不对称,采用非同步耦合有利于改善信号脉冲的压缩质量。
- 非线性光学 /
- 光子晶体光纤 /
- 分步傅里叶方法 /
- 离散效应 /
- 非同步耦合
Abstract: In order to study the influence of pulse walk-off on femtosecond signal pulse compression in photonic crystal fibers, the coupled nonlinear Schrdinger equations were numerically solved by means of standard split-step Fourier method. The nonlinear propagation of two femtosecond optical pulses in a photonic crystal fiber was simulated. The effect of pulse walk-off and asynchronous coupling on signal pulse compression was simulated and analyzed. It is found that the signal pulse can be compressed through the cooperation by group velocity dispersion, third-order dispersion, self-phase modulation and cross-phase modulation, when the pump pulse is input in the anomalous dispersion region while the signal pulse is input in the normal dispersion region. Pulse walk-off not only leads to the degradation of the compression ratio of the signal pulse but also leads to a longer fiber length at which the width of the compressed signal pulse is the minimum, and leads to the non-symmetry of the compressed signal pulse. It is also found that the quality factor of the signal pulse will be improved with the asynchronous coupling method.
- nonlinear optics /
- photonic crystal fiber /
- split-step Fourier method /
- effect of pulse walk-off /
- asynchronous coupling

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离散效应对光子晶体光纤中飞秒脉冲压缩影响

作者简介: 赵荣霞(1980-)，女，硕士，助教，主要从事宇宙线物理和光子晶体光纤非线性特性的应用研究。Email:zhaorxbzxy@163.com.

Effect of pulse walk-off on femtosecond pulse compression in photonic crystal fibers

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离散效应对光子晶体光纤中飞秒脉冲压缩影响

作者简介: 赵荣霞(1980-)，女，硕士，助教，主要从事宇宙线物理和光子晶体光纤非线性特性的应用研究。Email:zhaorxbzxy@163.com

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Effect of pulse walk-off on femtosecond pulse compression in photonic crystal fibers

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离散效应对光子晶体光纤中飞秒脉冲压缩影响

作者简介: 赵荣霞(1980-)，女，硕士，助教，主要从事宇宙线物理和光子晶体光纤非线性特性的应用研究。Email:zhaorxbzxy@163.com.

Effect of pulse walk-off on femtosecond pulse compression in photonic crystal fibers

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离散效应对光子晶体光纤中飞秒脉冲压缩影响

作者简介: 赵荣霞(1980-)，女，硕士，助教，主要从事宇宙线物理和光子晶体光纤非线性特性的应用研究。Email:zhaorxbzxy@163.com

English Abstract

Effect of pulse walk-off on femtosecond pulse compression in photonic crystal fibers

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